Iran’s Oil Minister Mohsen Paknejad landed on Kharg island, the oil ministry’s news website Shana reported, amid concerns that Israel could target Iran’s largest oil terminal there, Reuters reports.

An Israeli military spokesman said that Israel would retaliate, following last week’s missile attack by Tehran, “when the time is right.”

Following Iran’s attack, Axios cited Israeli officials as saying that Iran’s oil facilities could be hit in response. US President Joe Biden said that he did not think Israel had yet concluded how to respond.

“Paknejad arrived this morning in order to visit the oil facilities and meet operational staff located on Kharg island,” Shana reported, adding that the oil terminal there has the capacity to store 23 million barrels of crude.