Nathan DeSai has been identified as the gunman who shot and wounded nine people at a Houston strip mall. He was killed by police after a shootout

Nine people were shot and wounded, one critically, by a disgruntled Houston lawyer who was wearing a Nazi uniform during the rampage, sources have said.

Nathan DeSai was killed by police after he opened fire in a strip mall, striking innocent bystanders at 6.30am on Monday.

When officers arrived, the 46-year-old attorney fired at them until he was gunned down, police Chief Martha Montalvo said.

The FBI is helping the Houston Police Department establish a motive for the shooting.

But the bureau has said there was no immediate indication of any involvement with terrorist groups.

During the shooting, DeSai was wearing an antique Nazi uniform with Swastikas on it, according to the station.

Authorities said the man had two legal guns, a .45-caliber semi-automatic handgun and a tommy gun, as well more than 2,500 rounds of live ammunition at the scene.

Police found 75 spent rounds at the scene, which included bullets fired by officers and the suspect, KPRC2 reports.

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Police are seen searching a Porsche Boxster registered to DeSai near the scene where sources say he shot nine people in southwest Houston

Houston Homicide Capt. Dwayne Ready said investigators believe the gunman, whom police are not yet identifying, acted alone.

But with the investigation still underway, Ready said 'no doors are being closed.'

Ready says that other weapons besides the handgun found by the gunman's body and the tommy gun found in his vehicle were at the man's home.

But Ready would not describe those weapons.

He said the gunman was wearing military-style apparel.

Police found some old Nazi emblems in his personal effects inside his Porsche Boxter at the scene as well as vintage military items dating to the Civil War in his apartment.

DeSai was listed as a partner at McDaniel & DeSai LLP, a Houston-based law firm.

His LinkedIn profile now says he's no longer affiliated with the business — although his name still appears on a glass door at the firm's entrance, which is 15 miles away from the scene of the shooting.

'He was upset about his law partnership not going well,' DeSai's father, Prakash DeSai, told ABC13 reporter Miya Shay. 'They didn't have business.'

Former clients slammed the firm on Yelp for being 'unprofessional' and claimed they had been overcharged. One female customer accused DeSai of asking her out.

Jennifer Molleda looks at the blood specked face of her husband, Alan Wakim, who had two bullets whiz by his face after going through his windshield during the shooting in Houston

The first report of the shootings began at about 6:30am near Weslayan and Bissonnett streets in southwest Houston

When officers arrived, the suspect began firing at them, police Chief Martha Montalvo said

Numerous weapons were found at the scene, Montalvo said, and a bomb-squad robot is looking at a Porsche (pictured) that's believed to belong to suspect Nathan DeSai

Officers also found a number of Nazi materials (pictured) and guns inside his Porsche Boxster when it was searched by police and members of a bomb squad

Houston police say the Porsche 'had additional weapons inside.' Mayor Sylvester Turner, who is in Cuba for a trade mission, said the lawyer was 'disgruntled.'

'He was either fired or had a bad relationship with this law firm,' Turner said.

'The investigation is active. It's very, very early,' the mayor added. 'We want to make sure there is no other gunman. We are checking every angle, I can assure you.'

His business was criticized by reviewers on Yelp.

An angry customer wrote: 'I would NOT recommend this firm to anyone. My initial interview was with Desai. I was asked to pay a $1,500 retainer, which I paid under the impression that things were going to be taken care of.

'The end result was that nothing could be done to help me. I don't understand why I was charged so much money for them to simply tell me, Sorry, we can't help you. Besides that, Nathan Desai acted very unprofessional by asking me (a paying client) out for dinner and drinks.

Police say DeSai used a .45-caliber pistol in the shooting, although he also had access to other weapons

Cops found a long gun and more ammunition in his Porsche Boxster, which was parked at his apartment nearby

'I understand that attorneys cannot guarantee outcomes or results, but I was very offended by the lack of professionalism. '

Another said: 'I give them 1 star because it's the lowest rating allowed. If it were possible I would give them a negative million star rating. To start with Kenneth McDaniels is a raging alcoholic, that constantly had alcohol on his breath at all times of the day.

'When I had court and was supposed to be represented by both DeSai and McDaniels they showed up late to court. I found them to be unprepared and inexperienced once they showed up.

'As for their fees, they completely over charged for what little services they provided. I'm talking about 9,000 dollars for just under 2 days worth of work.

'Then when the case began to become difficult they decided to stop representing me. So basically they did poor work, took my money, and ran off with my money before my case was anywhere close to being finished.

'I wouldn't recommend these two jokes to even my worst enemies for representation of any level of law. They should be investigated by the bar association.'

Mayor Sylvester Turner, who is in Cuba for a trade mission, said the lawyer was 'disgruntled'

At least 20 first responders (pictured) were at the Randalls supermarket strip center, one official said.

'We wanted to make sure in view of what's happening across country and what's been happening recently, that this was not some act of terrorism, but one certainly can see when one has an incident of this kind it certainly creates terror on so many levels,' Turner said.

Officials have said there are 'questions' about his employment — but his partner denies it had anything to do with DeSai's motive for the shooting.

Kenneth McDaniel said he and DeSai closed their law firm in February due to economic conditions related to Houston's energy industry downturn.

McDaniel said the 12-year general law practice had 'good years and bad years.'

DeSai was listed as a partner at McDaniel & DeSai LLP, a Houston-based law firm, but authorities say he appeared to be disgruntled

Yet DeSai's former partner, Ken McDaniel, says the two split amicably because the economy had hurt their busines

McDaniel said DeSai wasn't fired and that he's had no contact with him lately.

Police called McDaniel on Monday morning to check on his safety, and he began to understand what was going on after seeing reports of shootings involving a lawyer.

But Mayor Sylvester Turner told KTRK-TV that the lawyer was 'disgruntled' and was 'either fired or had a bad relationship with this law firm.'

McDaniel says that he didn't know DeSai to pull a gun on anyone and that descriptions of him having 'issues' were 'amazing.'

Police in Houston have killed a gunman who shot at least nine people at a strip mall (pictured) early Monday.

Initial reports say the shooter struck nine people near Weslayan at Bissonnet in southwest Houston

Some witnesses have described the gunman firing dozens of shots at cars passing through a condo complex, which is near the affluent West University Place community.

Several cars with bullet holes and shattered windows were at a parking lot near the condo complex.

Of the nine wounded, one is in critical condition, another is in serious condition and three people were treated and released, Montalvo said.

One official with the Houston Fire Department says ambulances have transported at least nine people to local hospitals

The suspect was reported about 6:30am as firing on vehicles with a revolver at a strip mall

Cars and windows had bullet holes at the scene where the suspect allegedly fired about 6:30am with a revolver at a strip mall.

Officials said the gunman shot from behind a tree.

Houston police said the suspect was shot by an officer, ABC13 reported.

Police 'engaged' with the shooter and eventually 'neutralized' him, KHOU reported.

His condition and identity remain unclear.

Nearby, there was increased police activity at an apartment complex on Law Street, ABC7 reported.

Houston police said the suspect has been shot by an officer. His condition remains unclear

One report has claimed there were 'bodies on the ground' at the scene, according ABC13.

Police considered the scene active and deployed a bomb squad after a suspicious vehicle was reported near the scene, according to the station.

At least 20 first responders were at the Randalls supermarket strip center, one official said.

'We received a call at 6:29 we had a shooting at the Petco store...the first units were directed to the parking lot where the shooting was still active,' said spokesman Jay Evans, of the Houston Fire Department , to ABC13.

'We now have approximately 20 EMS personnel vehicles on scene. We do not know, we do not have a count at this time as to how many people have been shot, but all of the people will be directed to local hospitals in the area that are going to be victims.'

Traffic in the area has been shut down since the shooting began.

It is unclear how many people were shot. One report has claimed there were 'bodies on the ground' at the scene

One witness said police exchanged gunfire with the suspect.

'I literally heard the gunshots past my face,' Antoine Wilson told ABC13.

'I'd never been in a standoff like this,' he added. 'It was a whole bunch of shooting. Too much shooting, actually.

Wilson said he saw a mean bleeding from the side of his face.

The shooting comes days after a shooting at a Washington state mall that left five people dead.

On Sept. 17, a 20-year-old man stabbed 10 people at a Minnesota mall before being shot to death by an off-duty police officer.