Conveying its willingness to assist Delhi Police a fortnight ago, Iran has invited a team of investigators to visit that country to carry forward its probe, official sources said.
The visit was necessitated after the role of four Iranian nationals surfaced in the bombing that took place barely 500 metres away from the high-security residence of Prime Minister Manmohan Singh.
However, the Delhi Police missed the dates and could not send its team due to logistical reasons.
The Delhi Police again, through the Ministry of External Affairs, has requested Iran to give fresh dates for their travel.
In its probe, Delhi Police has named Houshang Afshar as the main accused who had planted a bomb on the vehicle of Israeli diplomat Tal Yeshua on February 13 that left the diplomat injured.
The names of three more Iranian nationals -- Masoud Sedaghatzadeh, Saeid Moradi and Mohammad Kharzei -- have also surfaced during the investigations into the case.
The Delhi Police also wants to corroborate the statement of Syed Mohammed Ahmed Kazmi, a senior Urdu journalist, arrested for allegedly being a part of larger conspiracy in the bombing incident as the police claimed that he named some Iranian nationals as his handlers during the interrogation.