An Iranian website Sunday laid out plans to kill the sons of Israeli Prime Minister Benjamin Netanyahu in apparent retaliation for last week's death of an Iranian general in a presumed Israeli airstrike on the Syrian Golan Heights. The Mashark website also detailed plans to kill the sons of former Israeli Prime Ministers Ariel Sharon and Ehud Olmert.

Jerusalem Online reported senior member of the Iranian Revolutionary Guards Hussein Salami called for "unique measures" to be taken against Israel in retaliation for the death of Gen. Mohammed Ali Allahdadi, who was killed along with six Hezbollah militants and another Iranian. The website published what it said was detailed intelligence data on Yair and Avner Netanyahu. However, Jerusalem Online reported, most of the information appeared to have come from Wikipedia.

The report said Marshark is "known for being in close relations" with the Revolutionary Guards. Israel has neither confirmed nor denied conducting the airstrike last Sunday on the Syrian side of the Golan Heights.

Maariv reported Allahdadi may have died because he failed to turn off his cell phone. Quoting the Lebanese newspaper al-Jomhouri, Maariv said Allahdadi was in the area to help set up "popular defense units" to help fight Syrian rebels.

The death threat comes as Netanyahu prepared to address the U.S. Congress Feb. 11 as the result of an invitation extended by House Speaker John Boehner and the pointed refusal of the White House to set up a meeting with President Obama while the Israeli leader is in Washington. Obama and Netanyahu are at odds over how Iran's nuclear program should be handled.

Talks between Iran and the so-called P5-plus-1 -- the five permanent members of the U.N. Security Council and Germany -- have been extended to July as the two sides failed to meet previous deadlines. The Israeli intelligence site DebkaFile has reported Tehran has held off signing any deal because the Revolutionary Guards have threatened to unseat supreme leader Ali Khamenei if he allows President Hassan Rouhani and Foreign Minister Mohamed Zarif to sign a comprehensive, binding nuclear accord.

The U.S. Senate is considering legislation that would impose new sanctions on Iran, a move supported by Netanyahu but opposed by the Obama administration. Administration officials said if sanctions are passed, it would be like throwing a grenade into the talks.