*Libyan leader Moammar Gadhafi escaped a NATO missile strike in Tripoli, but his youngest son and three grandchildren under the age of 12 were killed, a government spokesman said.

The strike, which came hours after Gadhafi called for a cease-fire and negotiations in what rebels called a publicity stunt, marked an escalation of international efforts to prevent the Libyan regime from regaining momentum.

Rebels honked horns and chanted “Allahu Akbar” or “God is great” while speeding through the western city of Misrata, which Gadhafi’s forces have besieged and subjected to random shelling for two months, killing hundreds. Fireworks were set off in front of the central Hikma hospital, causing a brief panic that the light would draw fire from Gadhafi’s forces.

The attack struck the house of Gadhafi’s youngest son, Seif al-Arab, when the Libyan leader and his wife were inside. White House spokesman Shin Inouye declined to comment on the developments in Libya, referring questions to NATO. Alliance officials in Brussels said a statement would be issued later Sunday but did not say when.

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