Iran has detained dozens of people, including military and intelligence officers, as part of its investigation into the assassination of Hamas political chief Ismail Haniyeh, Al Jazeera reports according to a New York Times report.

Also in custody are staff at the Tehran guesthouse where Haniyeh was killed, The New York Times reports, quoting two Iranians “familiar” with the investigation.

Security agents stormed the guesthouse, which is owned by the Islamic Revolutionary Guard Corps (IRGC) and placed all staff “under quarantine, arrested some, and confiscated all electronic devices, including personal phones”, sources told the newspaper.

Agents are also zeroing in on Iran’s airports in the hunt for perpetrators, who they believe are members of Israeli intelligence and are still in the country, the sources said.