Israeli Prime Minister Benjamin Netanyahu is expected to provide intelligence that Iran is building up its nuclear facilities at its mysterious Pickaxe Mountain site and the regime is lying about wanting to continue peace negotiations, a source in Jerusalem told The Post.

As Netanyahu prepares to meet with President Trump on Monday, the war in Iran and the Islamic Republic’s nuclear program are expected to be key conversation topics.

During the meeting, Netanyahu’s team will provide evidence of Iran’s latest nuclear activity and demonstrate that Tehran is not currently negotiating in good faith, the source said.

Israel has uncovered proof that nuclear centrifuges recently arrived at the secretive Pickaxe Mountain fortress for the first time since its construction began in 2020, the Wall Street Journal reported.

The base, which lies more than 300 feet beneath the Kolang Mountain near the Natanz nuclear facility, has long been suspected of being a part of Iran’s atomic program.

There has previously been no evidence of nuclear activity at the site, which Trump referenced as his reason for leaving it alone in past attacks on Iran.

Trump had notably attempted to downplay reports of activity at Pickaxe Mountain, telling reporters last week that the US did not have any information on that.

The president has recently signaled a willingness to bomb the mountain facility, with American forces also reportedly ready to launch a ground operation to seize hundreds of pounds of enriched uranium believed to be entombed in Iran.

Israel will also provide evidence that Iran is already rebuilding its missile and drone program that had been heavily crippled by America’s repeated airstrikes in the country, the source in Jerusalem added.

The intel would ultimately show that Iran is not serious about giving up its nuclear ambition or missile program during the cease-fire negotiations with the US.

Trump had opted to pause a nearly two-week-long bombing campaign on Iran over the weekend as new talks manifested to end Tehran’s attacks in the Strait of Hormuz.

Along with Iran’s suspicious movements, Netanyahu is also set to brief the president on the progress being made to maintain the cease-fire in both Lebanon and Gaza, where Iran’s terror proxies operate.

The prime minister will remain in Washington on Tuesday, where he will join Trump and other world leaders to pay their last respects to the late Sen. Lindsey Graham (R-SC).