In a statement, the judiciary’s media office described the attack as premeditated assassination.

It also said that, according to initial findings, the attacker had not been involved in any case considered by the supreme court. Officials are investigating whether anyone else is involved in the attack.

Both victims have been in the judiciary for decades. In the supreme court, their responsibilities would have included confirming death sentences.

Razini, 71, was one of Iran’s most senior judges and survived an assassination attempt in 1998.

Moghiseh, 68, has been sanctioned by the EU, the US and Canada over alleged human rights abuses.