US President Donald Trump is now “more seriously considering a resumption of major combat operations in Iran,” CNN reported overnight Monday, citing some of Trump’s aides.

Israel’s Channel 12 News previously reported on Monday evening that Trump is leaning toward resuming the war with Iran in some capacity, quoting two senior US officials.

According to the sources, Trump has become impatient with the closure of the Strait of Hormuz and with divisions within Iran’s leadership, which he believes are preventing Tehran from agreeing to concessions on the nuclear issue.

Trump’s frustrations may also stem from Pakistan’s role as mediator between the US and Iran. Two sources told CNN that officials close to Trump believe Pakistan frequently presents the US with a more favorable interpretation of Iran’s position than what actually reflects reality.

Additionally, CBS News reported on Monday that while Pakistan was mediating between Washington and Tehran, it also allowed Iranian military and intelligence aircraft to park on its airfields to avoid U.S. airstrikes.