Law enforcement officials are investigating after someone threw two bottles through a window at Rep. Emanuel Cleaver's Kansas City, Mo., office early Thursday morning.
The bottles resembled Molotov cocktails, but they did not ignite and did not cause damage other than the broken window.
John Jones, Cleaver's chief of staff, said in a statement it's the second time something like this has happened in the past three years.
"None of the staff was in the building, and because Congress is in session, Congressman Cleaver is in Washington, D.C.," Jones said in the statement.
The Kansas City Police, the Kansas City Bomb and Arson Squad, the FBI and the ATF are looking into the incident.
