Iran has arrested dozens of people on suspicion of spying as fears grow in the Islamic Republic over the extent of its infiltration by Israel’s Mossad intelligence service.

The Israeli military issues an "urgent warning" to people in Tehran's District 3 that air strikes will hit "military infrastructure" in the area.

Israel's military said it was striking military targets in Tehran in its latest salvo against the Iranian capital, after issuing evacuation warnings for one neighborhood. The military said it would publish more details as the situation progresses.

Red alert sirens warning of incoming fire have sent Israelis scrambling to bomb shelters over the last three nights, and Iran has vowed to keep launching ballistic missiles.

Pakistan’s embassy in Iran's capital Tehran is organizing evacuations for citizens who want to leave because of the conflict with Israel. (AP video by Tawab Khan)

Israeli fire killed at least 50 people on Monday, nearly half of them near an aid distribution site run by the U.S.-backed Gaza Humanitarian Foundation, the territory's Health Ministry said, as U.N. officials denounced Israeli-backed aid delivery methods.

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Israel called the move “outrageous.” A French official said Israeli companies were defying an agreement not to display so-called offensive weapons.

An Israeli airstrike struck Iran's state-run television broadcaster during a live broadcast Monday, intensifying an already volatile confrontation between the two regional rivals. The attack came amid a series of tit-for-tat strikes that have killed hundreds across both countries since the outbreak of hostilities late last week.

Israel faced retaliation from Iran after launching missiles against Tehran's leadership and energy infrastructure as part of "Operation Rising Lion" this weekend. Iran's military responded with a wave of missile strikes against Israel,

An Iranian state television reporter stopped a live broadcast when an explosion occurred an hour after Israel issued a warning to evacuate the area of Tehran where the TV studios are located.