US had contact with Iran before and after attack on Israel, says senior US official

The United States had contact with Iran through Swiss intermediaries ahead of Iran's attack on Israel, a senior US administration official has confirmed. 

Iran also sent the US a message after its attack, the official said, but declined to provide details. 

Meanwhile, the official said that Israel has made it clear to the US that it is not looking for a signifigant escalation with Iran.