Iran's top leader says no deal is better than a bad deal when it comes to negotiations with world powers over the country's disputed nuclear program.

In remarks posted on his website Sunday, Supreme Leader Ayatollah Ali Khamenei, who has the final say on all major decisions, says Tehran agrees with Washington that no agreement is better than an agreement that doesn't meet its interests, without elaborating.

Iran insists it has the right to enrich uranium and has demanded the lifting of crippling international sanctions. Tehran insists its nuclear program is entirely peaceful despite Western suspicions it has a military component.

Iran and the six-nation group — the U.S., Russia, China, Britain, France and Germany — hope to reach a rough deal by March and a final agreement by June 30.