A British-Iranian academic from Imperial College London has been arrested in Iran, becoming the latest of dozens of dual nationals taken into custody by Tehran since the 2015 nuclear deal.

Abbas Edalat, a professor of computer science and mathematics, was in Iran for an academic workshop when he was arrested on April 15 by the Revolutionary Guard, according to the Centre for Human Rights in Iran (CHRI).

“Iran’s continued arbitrary arrests of dual nationals without transparency and lack of due process is extremely concerning,” said Hadi Ghaemi, executive director of the CHRI.

“The Iranian judiciary and the security establishment, particularly the Revolutionary Guards, are responsible for the well being of these detainees.”

Iran has arrested at least 30 dual nationals since the 2015 nuclear agreement, according to human rights groups.

There are no exact figures on detainees but Iran is believed to be holding at least four British citizens including Mr Edalat.

Nazanin Zaghari-Ratcliffe, a charity worker with the Thomson Reuters foundation, was arrested in April 2016 and sentenced to five years in prison for allegedly plotting to topple the Iranian government. She denies all allegations.