One person critically injured in an explosion at New York's Central Park

New York: One person was injured in an explosion in New York on Sunday.

The incident took place around 11:00 am (1500 GMT) at the huge park in Manhattan.

It was unclear what caused the explosion but it may have been fireworks ahead of the Independence Day holiday on Monday, as per reports. 

The incident comes as US authorities step up security over the holiday weekend, especially at airports and other transport hubs.

The unidentified man "was walking, he stepped on a rock, there was some sort of explosion and he injured his left foot," New York Police Sergeant Lee Jones told AFP.

He was taken to a hospital in critical but stable condition.

An FDNY spokesman said first responders had transported the man "with a possible amputation to his leg... It appeared to be partially amputated" by the explosion.

(With Agency inputs)