BALTIMORE -- A young man in an animal costume and surgical mask who walked into a Baltimore TV station Thursday claiming to have a bomb was shot and wounded by police after leaving the building.

Police later determined his alleged explosive consisted of aluminum-wrapped chocolate bars duct-taped to a flotation device.

The 25-year-old was in serious but stable condition at a hospital and expected to survive, said Baltimore Police Department spokesman T.J. Smith, who added that the man was from nearby Howard County and that police would identify him after they had filed charges against him.

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But Ed Brizzi told CBS Baltimore Thursday night the man is his son, Alex Brizzi.

Ed Brizzi told the station Alex had recently changed his attitude, saying the world was going to end June 3.

Alex Brizzi, 25, in undated family photo provided to CBS Balimore by his father, Ed Brizzi CBS Baltimore/Ed Brizzi

"We really didn't see this coming," Ed Brizzi said. " ... We were looking at him, trying to assess him, trying to figure out what to do. He's 25 years old, so I can't say, 'You've got to go into the hospital,"' said Brizzi.

Authorities searched the suspect's home for hours Thursday night, the station says.

The progressively bizarre scene unfolded when the man walked into the lobby of Fox affiliate WBFF, knowns as Fox45, on Baltimore's TV Hill, just blocks away from CBS Baltimore and NBC affiliate WBAL-TV.

The man, wearing what Smith said was a panda suit and what employees described as a hedgehog costume, gave a flash drive to a security guard and told him he wanted the station to broadcast its contents.

Smith said police don't know what was on the drive, but the security guard told CBS Baltimore, "It pretty much had to do with anything with astronomy -- black holes, the sun, about it being liquid and gas, and he just wanted to say that the government was wrong in thinking about the way they do when it comes to anything in space."

The guard activated an alarm under his desk, and the station was quickly evacuated, WBFF General Manager Bill Fanshawe said. Police say the man barricaded himself in the station.

As police, fire, arson, bomb squad and SWAT teams converged on the scene, a car in the station's parking lot was engulfed in flames. Smith said it was later determined to belong to the man.

When police tried to talk with the man in the lobby, he walked out of the building and into the street, and refused to obey numerous orders by heavily armed officers to show his hands. Police shot him more than once, Smith said, then sent a bomb-detecting robot to him through which they communicated from a distance as he lay on the ground.

The man eventually removed the flotation device. Once the robot had picked it up and rolled away, police and paramedics rushed to him and put him in an ambulance, Smith said.

The faux bomb also contained a motherboard from a fire extinguisher and a wire that ran down the man's sleeve to what looked like a detonator, Smith said.

No one else was hurt, he said. Officers were sweeping the station to make sure the suspect did not leave anything dangerous.

Police Commissioner Kevin Davis called the man's behavior "bizarre," and "dangerous."

"This is a very, very unusual event," Davis said.