British police said on Tuesday they were dealing with a security incident at London's St Thomas' Hospital, with the nearby Westminster Bridge leading to parliament closed to traffic.
Police said they would provide more information when known.
Witnesses reported on social media that there were armed police present and that the hospital was not allowing people to enter or leave.
There was no immediate comment from the hospital.
Pentagon chief says ceasefire with Iran is not over
US Defence Secretary Pete Hegseth said on Tuesday that the ceasefire with Iran was not over, even as the US and Iran exchanged fire in the Gulf as they wrestled for control of the Strait of Hormuz.
US and Iran launch new attacks as they wrestle for control of Strait
The US military said on Monday it destroyed six Iranian small boats and intercepted Iranian cruise missiles and drones as Tehran sought to thwart a new US naval effort to open shipping through the Strait of Hormuz.
Israeli strikes kill two Palestinians in Gaza, medics say
Israeli strikes killed at least two Palestinians and wounded several others in the Gaza Strip on Tuesday, health officials said.
Blast at fireworks factory in China's Hunan kills 26, Xi calls for probe
A blast at a fireworks factory in China has killed at least 26 people and injured 61, flattening buildings and sending towering clouds of smoke into the sky, and prompting President Xi Jinping to order a thorough investigation, state media reported on Tuesday.
Russian attack kills 5 at Ukraine's Naftogaz gas production facilities, officials say
A Russian overnight missile and drone attack on Ukrainian gas production facilities killed five people, including two rescue workers, Ukrainian officials said on Tuesday, as Kyiv and Moscow exchanged rival ceasefire proposals.
