Iranian Majlis (parliament) Speaker Ali Larijani said Monday that the Islamic republic has arrested several suspects over the assassination of its nuclear official, the Arabic Language Al-Alam TV reported.

Photo: rferl.org

Larijani told Al-Alam that the investigations are underway to clarify the identity of the suspects.

He accused Israel of being behind the terror act and said that Iran will not remain silent and will respond to Israel in a proper way, said the report.

The 32-year-old Mostafa Ahmadi-Roshan, deputy chief of the commercial section of Iran's Natanz nuclear enrichment site, was killed in a car bomb attack in northern Tehran last Wednesday.

The Iranian media reported on Sunday that Iran's Foreign Ministry sent a protest letter to the U.S. government in which it said that the U. S. Central Intelligence Agency (CIA) is behind the recent terrorist attack which led to the assassination of the Iranian nuclear official.

U.S. State Secretary Hillary Clinton on Wednesday denied that the United States was involved in the assassination of an Iranian nuclear staff.

"I want to categorically deny any United States' involvement in any kind of act of violence inside Iran," Clinton said at a press conference at the State Department alongside visiting Qatari Prime Minister and Foreign Minister Sheikh Hamad bin Jassim al-Thani.

Several Iranian nuclear scientists have been assassinated in recent years and Iran accused the United States, Britain and Israel of being behind the attacks.

VietNamNet/Xinhuanet