An Israeli airstrike has struck a densely populated residential area in Lebanon’s capital close to the U.N. headquarters, Parliament, the prime minister’s office and several embassies.

Lebanon’s state-run National News Agency said two missiles hit the area of Zoqaq al-Blat. The target of the airstrike remains unclear, and the Israeli army did not issue a prior warning.

Amos Hochstein is expected in Beirut on Tuesday, according to two Lebanese official sources, in a sign of progress in ceasefire negotiations for the deadly cross-border conflict between Israel and Hezbollah in Lebanon.

US special envoy Amos Hochstein arrived in the Lebanese capital on Tuesday for talks with officials on a truce plan, which Lebanon has largely endorsed, to halt the Israel-Hezbollah war.The United States and France have spearheaded efforts for a ceasefire in the war,

The recent attacks are seen as part of Israel’s strategy to force Hezbollah and Lebanon to agree to a ceasefire, and an indication that it is prepared to expand its offensive by killing non-military members of the group and striking places outside areas where the movement has a strong presence, possibly to stir anti-Hezbollah sentiment.