It kills 9, according to the AP:

The motive behind the bomb attack wasn’t immediately clear, but it devastated an eight-story apartment building in the largely Christian New Jdeideh neighborhood shortly after midnight and sent panicked residents in their pyjamas into the street.

It also played to concerns among some Lebanese that pro-Syrian elements might resort to violence to show, in their view, the need for a continued presence by Damascus forces. Hundreds of thousands of Lebanese have taken part in demonstrations for and against Syria since Hariri was killed. The anti-Syrian protests have featured large numbers of Maronite Christians.

“This has been the message to the Lebanese people for a while — to sow fear and terror among Lebanese citizens,” Christian opposition member Pierre Gemayel told Al-Jazeera satellite television. The message is “if there is a Syrian withdrawal from Lebanon, look what Lebanon will face.”