Counter-terrorism police in Britain were investigating an explosion at a hospital Sunday in the city of Liverpool that killed one person and injured another.

Police were called to reports of a blast involving a taxi at Liverpool Women�s Hospital on Sunday morning. Police said the explosion had not been declared a terrorist incident, but counter-terrorism police were leading the investigation as a precaution.

�So far we understand, the car involved was a taxi, which pulled up at the hospital shortly before the explosion occurred,� Merseyside Police said in a statement. �Work is still going on to establish what has happened and could take some time before we are in a position to confirm anything.�

One person died and a man was being treated for non life-threatening injuries. Police said they were �keeping an open mind� about what caused the explosion.

The Liverpool Women�s Hospital said it immediately restricted visiting access until further notice and diverted patients to other hospitals �where possible.�

Fire services said they extinguished the car fire rapidly, and a person had left the car before the fire �developed to the extent that it did.�

(AP)