Iran warned on Tuesday that in response to a renewed US or Israeli attack, it could increase uranium enrichment up to 90%.

“We will review it in the parliament,” said Ebrahim Rezaei, spokesman for the Iranian parliament's Foreign Policy and National Security Committee, in a post through US social media company X, The Caspian Post reports, citing Anadolu agency.

Rezaei's remarks came as regional tensions have escalated since the US and Israel launched strikes against Iran on Feb. 28, triggering retaliation from Tehran against Israel, as well as US allies in the Gulf, along with the closure of the Strait of Hormuz.

A ceasefire took effect on April 8 through Pakistani mediation, but talks in Islamabad failed to produce a lasting agreement. The truce was later extended by US President Donald Trump without a set deadline.

On Sunday, Iran sent Pakistan its response to a US proposal for ending the war, but Trump dismissed it as "totally unacceptable."