US Defense Secretary Lloyd Austin said on Wednesday that he had not seen evidence that there was a Hezbollah bunker filled with cash built under a hospital in Beirut, adding that Washington would continue to work with Israel to get better insights.

Israel’s military said that Hezbollah has stashed hundreds of millions of dollars in cash and gold in a bunker built under a hospital in Beirut, adding that it would not strike the facility as it keeps up attacks against the group’s financial assets.

“We have not seen evidence of that at this moment. But, you know, we will continue to collaborate with our Israeli counterparts to gain better fidelity on exactly what they are looking at,” Austin told reporters in Rome.

Fadi Alameh, a Lebanese lawmaker with the Shia Amal Movement party and the director of the hospital in question, Al-Sahel, has told Reuters that Israel was making false and slanderous claims and called on the Lebanese Army to visit and show it had only operating rooms, patients and a morgue.

In a televised statement on Monday, the Israeli military’s chief spokesman said Hezbollah leader Hassan Nasrallah, killed by Israel last month, had built the bunker which was designed for lengthy stays.