President Suleiman is to lead national reconciliation talks
Six makeshift bombs exploded in the Corniche al-Mazraa area of central Beirut overnight on Sunday, Lebanese security officials say.
They caused damage to cars and shops but no casualties.
The blasts were in an area where sectarian clashes took place in May, shortly before the agreement to form a national unity government.
Further reconciliation talks are expected to start on Tuesday, chaired by Lebanese President Michel Suleiman.
One of the main issues on the agenda is expected to be the future of weapons held by Hezbollah.