A Virginia Tech student is charged with planting a homemade bomb in someone's apartment, then reporting that the second person was manufacturing explosives, according to Blacksburg police.

Janaka Nuwan Kumara Siriwardena, 21, of Sterling, is charged with burglary, manufacturing an explosive device, possessing cocaine and making a false report to a law enforcement officer, Blacksburg police Capt. Kim Crannis said in a news release.

He is being held without bond in the Montgomery County Jail.

According to a search warrant, an informant told a police officer that he had been in an Orchard Street apartment and seen a person pour what he described as gunpowder into a cylindrical object like a pipe.

He told the officer that the person then put BBs into the device and capped both ends before saying, "This is gonna be fun."

The informant told the officer that he saw other pipe-like items, powder and BBs in the apartment, according to the warrant.

Blacksburg police obtained a warrant and searched the apartment early Thursday morning along with the Virginia State Police and the Bureau of Alcohol, Tobacco, Firearms and Explosives.

They found an explosive device containing gunpowder and ball bearings, police said. No one was injured, and the device was rendered safe by the state police bomb squad.

A substance believed to be cocaine was also found in the apartment, police said.

An investigation determined that the explosive device and the substance had been planted in the apartment, police said.

No other information was available Thursday.