The attacks severed the last major overland route for relief supplies into Lebanon, international aid agencies told The Associated Press on Friday.

"This is Lebanon's umbilical cord," Christiane Berthiaume of the World Food Program told AP. "This [road] has been the only way for us to bring in aid. We really need to find other ways to bring relief in." Israeli ambassador to the U.N. Dan Gillerman told CNN that Israel is cooperating with the United Nations' relief program.

"We have established two corridors, one by sea and one by land, through which the United Nations and other agencies can actually provide all the aid they want," Gillerman said.

"We're working very closely with the United Nations organizations to make sure that it reaches the people, but everybody understands this is a war zone. This is not easy."

Israel also launched airstrikes against the southern suburbs of Beirut held by Hezbollah, continuing the conflict that began after Hezbollah captured two Israeli soldiers on July 12.

Hezbollah militants fired 135 Katyusha rockets into northern Israel Friday, killing one person in Mghar; wounding one in Tiberias and one in Safed, Israeli police said.

Police said one of the rockets hitting Kiryat Shmona was made in Syria and packed with 100 kilograms of explosives.

Israeli forces and Hezbollah continued to fight in southern Lebanon, and two Israeli soldiers were killed, officials said.

An Israeli strike killed 25 people in the village of Qaa in northeast Lebanon, according to Darweesh Hobeika, general manager of Lebanon's civil defense. Qaa is in the northern Bekaa Valley, close to the Syrian border.

Lebanese security forces said several people were wounded in the strike, which hit the parking lot of a site in which fruits and vegetables are stored. The security forces said most of the casualties were employees or truck drivers.

Israel Defense Forces has made no comment about the report. Qaa is near Baalbeck, an area the IDF has said Hezbollah uses for militant operations.

Traffic paralyzed

The airstrike on Beirut's northern Maameltain bridge killed two Lebanese people, Lebanese Red Cross said. LBC-TV reported the two victims were in vehicles on the bridge, which is located in a Christian neighborhood of eastern Beirut.

Traffic was paralyzed as Israel bombed the major northern routes out of the capital.

Lebanese Red Cross also reported one person dead and one missing after the Fidar-Halat bridge collapsed Friday. Israeli aircraft also took out the Madfoun and Casino bridges, according to Arab media.

Lebanese television showed a stretch of shredded highway full of craters, concrete boulders and dust.