The main questions now are how much the conflict will escalate and whether the United States will get more directly involved in the defense of Israel.

"All Israeli civilians are in bomb shelters as rockets from Iran are fired at Israel," the IDF said in a statement shared with Newsweek.

JERUSALEM (AP) — Iran said it fired dozens of missiles into Israel on Tuesday, a sharp escalation of the monthslong conflict between Israel and the Iran-backed militias Hezbollah and Hamas. There were no immediate reports of casualties as Israel ordered residents to head to bomb shelters and as air raid sirens sounded across the country.

Iran said in a statement after it began its missile attack on Israel that it was a response to the killings of Hamas and Hezbollah leaders. NBC News’ Keir Simmons reports that Iran said Israel would “face crushing attacks” if it responded.

Sirens sounded in Metula as well as Safed, according to the Israel Defense Forces. Hezbollah said it fired a rocket salvo and artillery to target Israeli soldiers in Metula. The border between Lebanon and Israel was never officially demarcated.

The Israel Defense Forces says it has launched "limited, localised and targeted ground raids" in southern Lebanon.

The Israeli military says it has begun a “limited, localized” operation against Hezbollah targets in southern Lebanon. Israeli forces are carrying out “targeted ground raids” in villages close to the Israeli border that pose an “immediate threat to Israeli communities in northern Israel,