Defense Secretary Lloyd Austin, on a visit to Jerusalem, demurred when asked if U.S. intelligence was involved in an attack that caused a serious setback to Iran’s nuclear enrichment goals Sunday, but he vowed the incident will not affect President Joe Biden’s effort to rejoin the Iran nuclear agreement.

Austin is on the second of a two-day visit to Israel, where he met with Israeli Defense Minister Benny Gantz and is scheduled to meet with Israeli Prime Minister Benjamin Netanyahu. The stopover, part of a four-country European swing, comes as the clock is running out on a decision to withdraw troops from Afghanistan and while Biden pursues an agreement with Iran that Israel is dead set against. It is unclear if Austin knew the Natanz nuclear facility would be targeted before he landed in Israel. The country has neither accepted nor denied responsibility for the incident.