His brother and sister have both posted what appear to be pro-jihadi material, with his sister Aziza posting: 'No to democracy.'

This is the alleged New York and New Jersey bomber pictured during a trip he made to Pakistan - where law enforcement fear he was radicalized.

In the picture, Ahmad Rahami squats on a small stool in front of a sizzling grill of kebobs while his brother, Mohammad Khan Rahimi, attends to the meats.

The tubby alleged bomber has a thick beard and is wearing traditional long, black robes with a skull cap and large scarf wrapped around his neck.

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Ji-fati: Tubby 'terrorist' Ahmad Khan Rahami and his brother Mohammad Khan Rahami are seen cooking during time spent in Pakistan

Family affair: Ahmad Khan Rahami posted this image on social media shortly after the picture he posted of him and his brother enjoying kebobs in Pakistan. It is associated with jihadi groups

Brother: Mohammad Khan Rahami, who at some point lived in Pakistan, posted the picture of his brother. Recent images (left) show he had begun to wear traditional clothing

Enemy of America: The suspected New York and New Jersey bomber's sister Aziza - who called herself Masood Maymunah online - posted a message from Anwar al Waklaki, the notorious American preacher who was killed by a drone strike in Yemen on the orders of President Obama

Anti-democracy: Aziza, who called herself Masood Maymunah, also posted this picture, an adaptation of an Egyptian anti-government protest symbol, which contained a pro-jihadi message calling for an Islamic caliphate

New York destroyed: One of the images in a video which was posted by the alleged terrorist's sister on social media, part of a video suggesting that the end of the world is coming

Shared: Aziza, who called herself Masood Maymunah, shared the video from this Facebook group, which has posted ISIS propaganda, including this video it posted on the 14th anniversary of the September 11 terror attacks

Ahmad Khan Rahami, 28, was taken into custody on Monday after a shootout with police in Linden, New Jersey. He is seen above being taken from the scene on a stretcher

The brother he is with posted the picture in April 2013, during one of Rahami's lengthy trips out of the U.S.

Days later Mohammad Khan Rahami posted a message linked to jihadi causes.

Mohammad Khan has not been arrested or charged and it is unclear if he is currently in the United States.

Social media suggests that he had split his time between New Jersey and Pakistan and Afghanistan.

Detectives are now investigating if the New York and New Jersey bomber received terror training on his 'radicalization' trip to Pakistan.

The most recent posting he made suggests that, like Ahmad, he had started wearing traditional garb - something which a neighbor told DailyMail.com the brothers had started doing recently.

Mohammad Khan Rahim's Facebook account was deleted after his brother's arrest.

Ahmad is currently awaiting questioning by the FBI and facing five attempted murder charges in New Jersey.

He had yet to be read his rights and had not been released from the hospital in New Jersey where he was taken after the shootout with police in Linden, New Jersey, on Monday in which he was captured.

The brothers are from a large family, with the father Mohammad Rahami said by a neighbor to have has many as 11 children.

One of them, daughter Zobyedh, who is a public health student at nearby Rutgers University, posted a plea for privacy on social media on Monday, after her brother's arrest.

One of their sisters, Aziza, who called herself Masood Maymunah on Facebook, also posted a pro-jihad message endorsing an 'Islamic caliphate' and saying 'no to democracy'. She was addressed online by Mohammad Khan Rahami as 'sis'.

It is an adaptation of a symbol commonly used during anti-government protests by the Muslim Brotherhood in Egypt in 2013, known as R4BIA, but with the addition of the messages which suggest support for al-Qaeda or ISIS.

ISIS claims to be a caliphate and had just begun its rise in 2013, but it is not clear that the adapted version of the R4BIA logo is pro-ISIS. It may also be pro al Qaeda.

Maymunah appears to have lived in Quetta, Pakistan with her husband and young children, although again it is unclear if she remains there.

Involvement: Mohammad Rahimi snr, seen outside the family home and business on Tuesday, said he told the FBI two years ago that his son was a terrorist

Family home: The Rahami family live above the chicken shop run by the father, Mohammad Rahami.

Investigators say they were able to identify Rahami (pictured above in different pictures mugshots) from a fingerprint on a second pressure cooker bomb planted in Chelsea that didn't explode

She also posted two other provocative messages - one a quote from Anwar al-Awlaki, the notorious American preacher of hate who posted pro-al Qaeda messages online before he was killed by a drone strike in Yemen in September 2011.

The message reinforces the sister's apparent opposition to democracy.

She also posted a video from a Facebook group called Soldiers of Allah 2, which appears to offer support for a caliphate.

The apocalyptic video calls for the restoration of the caliphate and features images of New York on fire.

The website she shared it from also features pro-ISIS videos, including one celebrating its rise which was posted provocatively on September 11 2015.

Other items she posted include sharing a post about claims that the 9/11 attacks were carried out by the U.S. government as an 'inside job' with the intention of smearing Muslims; sharing a post with claims that the attacks were carried out by 'Israel with the agreement of many Zionists'; and a post about a British rapper who joined ISIS in which a DailyMail.com article was 'analyzed' with the conclusion: 'when young brave muslim want to make a differences and help the innocent you call them terrorist.'

The presence of pro-jihadi material on the family's social media comes after the father's admission that he had reported his own son to the FBI as a possible terrorist.

Law enforcement sources have said that Ahmad Rahami repeatedly traveled at length to Pakistan and Afghanistan and are investigating whether he was radicalized there.

Mohammad Rahami Sr, said on Tuesday: 'Two years ago, I call the FBI. My son he's doing really bad, ok?

'But they checked it almost two months. He's ok. He's clear. He's not... terrorist. Now say he's a terrorist. I say ok.'

When asked why he called the FBI two years ago, Mohammad said it was his son's violent outbursts.

'Because he doing bad. He stab my son and hit my wife. I put him in the jail.'

Rahami said the son he had stabbed was Nasim, confirming details revealed exclusively by DailyMail.com on Monday.

Family arrested: This was the moment the FBI and other law enforcement stopped members of the Rahami family in Brooklyn, New York. They were later all released

Freed: The five members of the Rahami family who were arrested were later released without charge

‘For no reason, because he stabbed my son and hit my wife. And I took him to jail two years ago.’

Asked what Ahmad had done to his mother, Rahami said: ‘He hurt... I have to go.'

Sonia Reyes, a long-time friend of the family, who runs the beauty salon next door to the Rahamis' fried chicken shop in Elizabeth, New Jersey, said it was clear that he had changed on his trips abroad.

Reyes, 46, told DailyMail.com she was 'shocked' and 'sad' to learn that Ahmad was suspected of planting a pressure-cooker bomb and another device in the heart of Manhattan on Saturday night.

'He comes to my beauty salon and I cut his hair for a long time. Maybe 14, 15 years.

'That's why I don't feel good because you would never think of this.'

She said that Ahmad has a Dominican wife and a child. She did not know her name but Fox reported on Monday that Rahami's former partner was called Maria.

Reyes said that she had been close with the family whose business sits alongside her store, Sonia's Beauty Color Express.

'I know Mohammad his father, the whole family I know,' she said. 'Very nice people, very normal people. You never think about how they would think, or what they would do.'

The salon owner said that after one trip to Afghanistan, Ahmad had returned a changed man.

'He went back to his country and he stayed there for six months and when he came back here, he had changed a lot.

[He was] very different. Everything – his clothes, before he would talk a lot, but then he was very quiet.'

There are now mounting questions about whether other family members knew about his plot, including his mother and wife who left the U.S. for the Middle East right before the attacks.

Brother: Nasim Rahami is the younger brother of the alleged terrorist. It was alleged that Ahmad stabbed him two years ago

Family: Among the Rahami family is daughter Zobyedh, who is a public health student at nearby Rutgers University

Plea: The suspected bomber's sister issued this appeal on social media.

The Los Angeles Times reports that Rahami's wife left for Pakistan just days before the bombings, and was stopped by officials in the United Arab Emirates, a popular stopover for flights between the U.S. and the Middle East.

It's still unclear whether she was allowed to travel on to Pakistan, was held in the UAE or returned to the U.S.

Rahami's mother also left for Turkey three weeks before the attacks, and has not yet returned to the U.S., an official told ABC News.

Questions still linger about the five other family members who were pulled over and taken into custody Sunday night.

At the time, it was alleged that the five people were armed and en route to JFK Airport. On Monday, those family members were released without being charged.

Authorities told CNN that Rahami had spent a year, between 2013 and 2014, in Pakistan where he traveled to the city of Quetta - a hotbed of extremism.

While there he stayed with family in refugee camps, authorities confirmed. He also visited Karachi in 2005, and an unknown region in 2011.

The most recent trip took place in 2014, when he petitioned NJ congressman Albio Sires to help him get his then-pregnant wife a visa.

Despite his heavy travel to and from the Middle East, officials said that Rahami was not on any terror watch lists.

The style of bombings in Seaside Park, New Jersey and the Chelsea neighborhood remind investigators of the Boston Marathon bombings.

The 28-year-old has been charged with five counts of attempted murder of a law enforcement officer and two gun charges after he was captured in an FBI shootout following the terror attacks in New York and New Jersey over the weekend.

Bail has been set at $5.2 million and he remains in hospital after being shot while being taken into custody.

So far, his Miranda Rights have not been read to him and the FBI continues to investigate the bombings before officially charging him in connection to those incidents.

Almost 30 people were injured in the devastating Manhattan attack in the upscale neighborhood of Chelsea on Saturday evening.

Shortly before the blast, Rahami was seen on surveillance footage walking down 23rd Street in Chelsea, dragging a wheeled bag behind him. That bag, police say, contained the shrapnel-packed pressure-cooker explosive which he used in the attack.