The US is "studying" whether to reduce the thousands of troops it has stationed in Germany, Donald Trump has announced via social media.

It comes just days after German Chancellor Friedrich Merz criticised his approach to the war in Iran, suggesting that US had been "humiliated" by Iranian negotiators.

In his post, Trump said he is "studying and reviewing the possible reduction of Troops in Germany, with a determination to be made over the next short period of time." The US has a significant military presence in Germany, with more than 36,000 active duty troops assigned to bases across the country as of last December.

The BBC has reached out to the White House for comment.

Merz made his initial remarks on Monday in an address to university students in Marsberg, telling them that "the Americans clearly have no strategy".