The following are some latest developments of shooting rampage in which at least 33 were killed at Virginia Tech at Blacksburg, Va., Monday morning, based on U.S. media reports.

-- U.S. President George W. Bush's staff has talked to Virginia Tech officials about the possibility of Bush's visit to the campus this week, Tech President Charles Steger said at a press conference Monday evening.

-- Authorities said they have identified a "person of interest" but do not have anyone in custody. That person is cooperating with authorities, they said.

-- Va. Tech police Chief Wendell Flinchum said that an estimated 15 people have been injured from the shooting.

-- Flinchum said police had made a preliminary identification of the shooter but were not releasing the identity. He also said that two weapons were recovered but declined to say what they were.

-- Norris Hall, where 31 of Monday's 33 victims died and 15 more were injured, is a crime investigation scene on Monday night.

-- A long piece of yellow police tape is tangled in a tree and federal Bureau of Alcohol, Tobacco, Firearms and Explosives agents seemed to be looking through windows of cars parked in the campus. No vehicles are being allowed onto campus.

-- "Hokies United," an ad hoc group that has brought together Virginia Tech's student organizations during past tragedies, is organizing a candlelight vigil Tuesday night.

-- Virginia Governor Tim Kaine has declared a state of emergency.

-- Va. Tech students have started a facebook site titled "I'm ok at VT" to let each other know their whereabouts and ask about people who are missing.