A man accused of trying to detonate a car bomb in Times Square was videotaped buying consumer-grade fireworks at a Pennsylvania store that a company official said were not nearly strong enough to make a powerful bomb.

Bruce Zoldan, president of Ohio-based Phantom Fireworks, said Faisal Shahzad, 30, was captured on surveillance video buying fireworks from his company’s Matamoras, Pa., showroom, within the last two months.

“The M-88 he used wouldn’t damage a watermelon,” Zoldan said. “Thank goodness he used that.”

Shahzad was charged Tuesday with trying to blow up a crude gasoline and propane device inside a parked SUV amid tourists and Broadway theatergoers. He was in custody after being hauled off a Dubai-bound plane he boarded Monday night at John F. Kennedy International Airport despite being under surveillance and placed on the federal no-fly list.

Authorities say Shahzad has admitted his role in the botched bombing plot and is cooperating with investigators, but don’t yet know whether others were involved in the plan to blow up the SUV.

U.S. officials in Washington said Wednesday they’ve been unable to verify statements that Shahzad trained at a Pakistani terror camp, according to the complaint against him, and haven’t linked him to any terror group.

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Meanwhile, an official with knowledge of the investigation told The Associated Press that the video police released right after the botched bombing of a man shedding his shirt near the SUV had the effect of falsely reassuring the real suspect he wasn’t a target.

The unidentified man — whom Police Commissioner Raymond Kelly referred to in his first briefing after the failed bombing as someone police sought to interview — is now not believed to be involved with the attack, the official said, speaking on condition of anonymity because of the sensitive nature of the case. Police have not interviewed the man.