Israel (search) lodged a formal complaint with the United Nations (search) after three rockets slammed into its northern border region from neighboring Lebanon, the Israeli Foreign Ministry said Friday.

The military said two Katyusha rockets landed in a disputed area overnight, causing no casualties. On Wednesday a rocket hit a bakery in the town of Shlomi (search), causing extensive damage but injuring nobody.

"We filed a complaint at the United Nations Security Council," Foreign Ministry spokesman Mark Regev told The Associated Press. "These rockets are a grave violation of our international borders."

Thursday night's attack occurred in an area called Chebaa Farms (search) by the Lebanese and Mt. Dov by the Israelis. A U.N.-drawn border that followed Israel's withdrawal from south Lebanon in 2000 left the area under Israeli control, but Lebanon claims it. The United Nations says the region is part of Syria.

Hezbollah guerrillas sporadically attack Israeli forces there, but there was no claim of responsibility for the latest incidents.

Earlier this week, Israel mistakenly fired an artillery shell into Lebanon while clearing explosives planted by the guerrillas near the border. The army said the shell fell in an open area, causing no damage or casualties.