The United States launched a new wave of strikes against Iran on Wednesday, according to the US Central Command.

The US military began launching more strikes against Iran about 7am (AEST) on Monday, after a weekend in which the two countries exchanged heavy missile and drone assaults.

Sunday's attacks follow three previous days of tit-for-tat strikes between Iran and US as a June ceasefire deal frays.

The United States on Wednesday launched a fresh wave of strikes against Iran, further escalating the conflict between the two countries.