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.
UN says renewed Gaza hostilities must be avoided
UN Secretary-General Antonio Guterres urged Hamas to continue with the planned release of hostages on Tuesday, a day after the group announced its intention to halt the exchange.
Trump raises tariffs on aluminum and steel imports
US President Donald Trump substantially raised tariffs on steel and aluminum imports to a flat 25 per cent "without exceptions or exemptions" in a move to aid the struggling industries but which increases the risk of a multi-front trade war.
35 civilians killed in east Congo
Armed rebels killed more than 35 civilians during an attack on a cluster of villages in eastern Democratic Republic of Congo's Ituri province on Monday night, a village chief said on Tuesday.
South Korean teacher admits to stabbing girl to death
A teacher accused of stabbing an 8-year-old student to death at an elementary school in the central city of Daejeon has said she was "annoyed" at being excluded from a class, police said Tuesday.
Philippines kicks off election campaigning amid political drama
Campaigning for the Philippines' midterm elections kicked off on Tuesday against a fractured political backdrop, heightened by a high-profile row among warring elites that culminated in last week's impeachment of Vice President Sara Duterte.
