A man who robbed two Prince George’s County banks by threatening to detonate a nuclear bomb was arrested near the Texas-Mexico border Monday, authorities said.

Marvin Simmons (Courtesy Prince George's County Police)

Simmons, according to Prince George’s County police, was somewhat unique among bank robbers in that he passed a note to tellers threatening to detonate a nuclear bomb if they did not give him cash. Investigators believe the threats were empty, though Simmons was able to make off with cash, said Cpl. Mike Rodriguez, a Prince George’s County police spokesman.

“There’s no indication that I know of that he did, in fact, have any type of explosive devices,” Rodriguez said. “For now, we believe they were just threats.”

Rodriguez said investigators believe Simmons was responsible for at least two bank robberies — one Jan. 10 at the SunTrust in the 5700 block of Crain Highway in Upper Marlboro and the other Dec. 29 at the Wells Fargo in the 5800 block of Silver Hill Road in District Heights. Rodriguez said he did not know what evidence investigators had to connect Simmons to the crimes.