DUBAI — Israel unleashed airstrikes across Iran for a third day Sunday and threatened even greater force as some Iranian missiles evaded Israeli air defenses to strike buildings in the heart of the country. Planned talks on Iran’s nuclear program, which could provide an offramp, were canceled.

The Israeli military said it killed nine senior scientists and experts who played a role in Iran’s nuclear program in strikes Friday. Israel says Iran intends to build a nuclear weapon, and is quite close to being able to.

Iran and Israel continued on Sunday their aerial attacks, which began Friday with a series of Israeli strikes on Iran.

Iran conflict could open opportunities for Russia to possibly become a power broker to help end the confrontation.