The Delhi Police have stepped up efforts to extradite an Iranian national — alleged to be one of the conspirators of the February 13 bomb attack on an Israeli embassy staffer here — to India.

Sources said investigators have approached the Central Bureau of Investigation to seek Interpol’s assistance to bring Sedaghatzadeh Masoud, currently in the custody of the Malaysian police, to India.

Masoud is alleged to be the head of a terror module that executed series of bomb attacks in Bangkok on February 14 and believed to have guided the bombers in New Delhi.

According to the Delhi Police, Masoud was in touch with Iranian national Houshang Afshar Irani, a key conspirator behind the February 13 attack.

Masoud was arrested at an airport in Malaysia on February 15, a day after the explosions rocked the Thai capital. The Thai police said bombs were found in the house where the blast occurred, and that Masoud and two Iranian men — now in custody — were seen leaving the building.

The blasts in Bangkok had injured five people and an alleged Iranian bomber. The 31-year-old faces charges of taking part in making and possessing explosive device, and causing explosion to cause injury to another person or damage property. The February 13 attack in New Delhi had wounded Israeli diplomat Tal Yehoshua Koren, her driver and two others.

Open warrants under Section VII A of the Code of Criminal Procedure (CrPc) have already been obtained against Masoud, Afshar Irani, and two other suspected Iranian origin conspirators — Syed Ali Mahdiansadr and Mohammadreza Abolghasemi.

Red Corner notices (international alerts) against Afshar Irani, Mahdiansadr and Abolghasemi are expected to be issued by Sunday.