LUBBIYA, Lebanon - A blast shook the home of a mayor from the Shiite Muslim Hizbollah group overnight leaving a small hole in the building's outer wall, but causing no casualties, security sources said on Tuesday.

The motive for the attack in Lebanon's eastern Bekaa Valley was not immediately clear. The sources did not expect any immediate escalation of violence in the town, where family rivalries can run deep, AFP said.

Hizbollah helped end Israel's 22-year occupation of southern Lebanon in 2000.

The group is involved in Lebanese politics and has 10 representatives in the country's 128-seat parliament. Ali al-Jabali was elected mayor of Lubbiya in 1998.

On Monday, Israel returned the remains of two Hizbollah members killed battling the Jewish state, in what analysts said was a precursor to a possible prisoner swap deal.