Iran has fired ballistic missiles at the US Naval Support Activity Bahrain, headquarters of the US Fifth Fleet in the Juffair area of Manama, according to multiple social media and open-source intelligence accounts posting on February 28, as sirens sounded across Bahrain, Qatar and the UAE.

Images sent to IntelliNews by people in Bahrain show the alleged target location of Iran's latest strike in Manama's Juffair area, according to those watching from skyscrapers near the US base.

The US Embassy in Manama issued a shelter-in-place alert, urging American citizens to take cover due to threats from missiles and drones, warning of falling debris from interceptions.

Reports circulating on social media cited explosions and smoke visible in the Juffair area near the base, with some accounts claiming direct hits on the facility.

The claims have not yet been confirmed by the US military or Bahraini authorities.

IntelliNews cannot independently verify the reports, and some imagery circulating on social media has not been confirmed as relating to today's incidents.

The reported strikes would represent a major escalation in the conflict, marking the first claimed direct Iranian attack on a US military installation in the Gulf since Washington and Israel launched joint strikes on Tehran, Isfahan and Qom earlier on February 28.

President Donald Trump had warned Iran that American bases in the region would face retaliation and that the Iranian regime would face the full force of the US military.

Iran's IRGC earlier confirmed it had launched a large-scale retaliatory operation against Israel, firing dozens of ballistic missiles toward Israeli territory and warning that Israel had "miscalculated" in backing the strikes on Iran.

This story is developing. Details remain unverified and subject to change.