This is the moment a suicide bomber ignored police warning shots at a checkpoint in Chechnya before blowing herself up.

Karina Spiridonova is seen dressed in black and wearing a hijab walking alone towards armed officers in the capital, Grozny.

Police say the 'radicalised woman' - revealed today as the daughter of a pro-Vladimir Putin local politician in the Urals - then detonated her suspected suicide belt.

Newly released video shows the explosion which killed the 25-year-old. The blast over the weekend did not cause casualties among police at the checkpoint.

Police are seeking to understand her motives and possible accomplices amid claims she may have been 'brainwashed' by ISIS-backing militants. She left a scrawled message to Allah saying 'forgive me' 21 times before killing herself.

Footage captures the moment suicide bomber Karina Spiridonova ignored police warning shots at a checkpoint in Chechnya before blowing herself up

Spiridonova is seen dressed in black and wearing a hijab walking alone towards armed officers in the capital, Grozny. Police say the 'radicalised woman' - revealed today as the daughter of a pro-Vladimir Putin local politician in the Urals - then detonated her suspected suicide belt

Newly released video shows the explosion which killed the 25-year-old. The blast over the weekend did not cause casualties among police at the checkpoint

Pictures showed her mutilated body at the scene of the explosion.

'Seeing her strange behaviour, officers on duty told her to stop and show her ID,' said Chechen acting interior minister Alti Alaudinov.

'Instead of meeting the demand, the woman ran towards the checkpoint.'

Footage appears to show her walking not running, giving police marksmen time to get in position.

It is unclear how many shots were fired by police before she 'detonated her suicide belt'.

'The police officers noticed her wearing a suicide belt and at that moment they fired a warning shot,' he said.

'The young woman blew herself up.'

Spiridonova (pictured) once wore short dresses and enjoyed parties. She wanted to be a teacher but became strongly religious after coming under the influence of a radical imam - also meeting a mysterious man who she married two years ago, say reports

She left a scrawled message (pictured) to Allah saying 'forgive me' 21 times before killing herself

Earlier Spiridonova had been a talented volleyball player whose mother Elena Yumanova, 44, is a PE teacher and activist in pro-Putin United Russia party

Earlier Spiridonova had been a talented volleyball player whose mother Elena Yumanova, 44, is a PE teacher and activist in pro-Putin United Russia party.

Spiridonova once wore short dresses and enjoyed parties. She wanted to be a teacher but became strongly religious after coming under the influence of a radical imam - also meeting a mysterious man who she married two years ago, say reports.

She moved away from her home region which is 1,500 miles north east of where she died in the apparent terrorist attack.

Sergey Grinin, the chairman of pro-government Civil Security organisation warned that ISIS recruiters are preying on 'immature' young people 'who can be zombified and whose life instincts are manipulated'.

It is likely someone was 'orchestrating Karina's actions', he said.

'All suicide bombers are being followed and watched. Even if they decide to give up, somebody will push the button for them.'

A law enforcement official said Russia was seeking 'possible organisers and accomplices as well as the circumstances behind the incident'.

Chechnya is a predominantly Muslim region ravaged by two wars since the fall of the Soviet Union.

Strongman leader Ramzan Kadyrov - backed by Putin - claims to have restored order in the oil-rich Trans-Caucasus territory.