Former President Barack Obama told ABC News that it was "doubtful" that any new deal reached by President Donald Trump between the U.S. and Iran to prevent Tehran from acquiring nuclear weapons will be different from or better than the agreement he negotiated in 2015.

His comments came before the United States and Iran announced they had reached an agreement to end the war, reopen the Strait of Hormuz, and begin follow-up technical talks.

Full details of the deal were not immediately available, and it remained unclear whether the agreement would impose new restrictions on Iran's nuclear program or address its stockpile of highly enriched uranium.

President Donald Trump confirmed a deal had been reached and said he had authorized an end to the U.S. naval blockade of Iranian ports in the Strait of Hormuz.

"It is doubtful that any agreement that arises is going to be significantly different or a significant improvement from the deal that we had in the first place and had worked for a long stretch of time before we, the United States, pulled out of it," Obama said in the interview.

The former president added that "in retrospect, it is a reminder that ... the notion that we can just bully our way or bomb our way to solutions may sometimes seem appealing, but the fact of the matter is that taking the time to explore diplomacy and exhaust the possibilities of coming up with deals that don't solve 100% of the problem but solve 80%, 90% of the problem, while avoiding the necessity of going to war, you'd think we would've learned that lesson by now, but it seems like every so often we have to re-learn that lesson again."