Iran’s Islamic Revolutionary Guard Corps (IRGC) chief Hossein Salami warned Thursday of further retaliation against Israel if it attacks Iranian targets, which Israel has vowed to do after Iran’s missile attack on Oct 1.

“If you make a mistake and attack our targets, whether in the region or in Iran, we will strike you again painfully,” Salami said at the funeral of an IRGC general killed in an Israeli strike alongside Hezbollah chief Hassan Nasrallah in Lebanon last month.

Abbas Nilforoushan, a top commander in the IRGC Quds Force foreign operations arm, was killed on September 27 alongside Hassan Nasrallah, the chief of Lebanon’s Hezbollah, in an Israeli strike on south Beirut.

Funeral services for Nilforoushan, whose body the Guards said was recovered last week, began on Monday in Iraq. His body was then moved to Iran for burial in his hometown of Isfahan later Thursday.

During his speech Salami criticized as “not reliable” the THAAD missile defense battery which the Pentagon on Tuesday said arrived in Israel, along with about 100 American troops to operate it.

“Do not trust these systems. You cannot massacre Muslim nations and remain safe,” he said.

“We know your weaknesses. You know them well,” he added addressing Israel.

The Terminal High Altitude Area Defense (THAAD) system is “designed to intercept targets outside and inside the atmosphere,” according to its manufacturer Lockheed Martin.

Salami’s remarks came as Iran’s Foreign Minister Abbas Araghchi intensified diplomatic efforts on ways to contain the conflicts in Gaza and Lebanon from spreading across the region.

Araghchi has over the past nearly two weeks visited Lebanon, Syria, Saudi Arabia, Qatar, Iraq, Oman and Jordan.

He is currently in Egypt and is scheduled to head to Turkey afterwards.

Iran has said its October 1 missile barrage, most of which was intercepted by Israeli air defenses, according to Israel, was in retaliation for the killing of Nilforoushan, Nasrallah, and the political chief of the Palestinian movement Hamas.