The United States has condemned the assassination of an anti-Syrian politician in Lebanon.
White House spokesman Scott McClellan called for a complete investigation into the killing of George Hawi, the former leader of Lebanon's Communist Party.
A State Department spokesman Adam Ereli said Syria contributes to instability in Lebanon. He said the instability is partly due to the continued presence of Syrian intelligence assets there.
Lebanese police say a remote-controlled bomb killed Mr. Hawi in his car in Beirut Tuesday. A similar blast killed Lebanese newspaper columnist Samir Kassir earlier this month.
Meanwhile, U.N. investigators are probing the assassination of former Prime Minister Rafik Hariri in February.
His killing sparked widespread political unrest in Lebanon and forced Syria to withdraw its troops from the country. Mr. Hariri's son, Saad, then led an anti-Syrian alliance to a parliamentary majority in elections.