Beijing campus blasts injure 9
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Police say there has been no claim of responsibility for the blasts
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BEIJING, China (CNN) -- Chinese police are investigating explosions that shook the campuses of two Beijing universities Tuesday injuring nine people.
Officials say the devices in the cafeteria areas at the Peking and Tsinghua universities appear to have been built using homemade explosives.
"Preliminary investigations show a homemade black gunpowder dynamite device was used in both cases," said Liu Wei, spokesman for Beijing's Public Security Bureau.
Police sealed off portions of both campuses as part of investigations into who might have planted the explosives.
There has been no claim of responsibility or prior warning that such an attack might take place.
The two blasts occurred Tuesday afternoon about an hour apart -- first at Tsinghua University, then at Peking University. Six people were injured in the first blast, three in the second.
The blasts blew out several windows but appear to have caused only minor structural damage to the university buildings themselves.
