Blasts, exchanges of gunfire heard in Jakarta, Indonesia

Several blasts and exchanges of heavy gunfire have rocked the centre of the Indonesian capital Jakarta.

Local media has reported at least three explosions, although there are also reports of up to six blasts. There are also reports of heavy gunfire nearby and unconfirmed reports a police officer has been shot.

According to wire service, AFP, a police post in the centre of the city was damaged by several bomb blasts and at least three causalities were seen in the street.

A United Nations staffer, Jeremy Douglas, was working in a UN building nearby when the blasts rang out.

He has tweeted, saying he has heard a hail of gunfire, followed by police and security forces urging everyone to stay away from doors and windows.

Update: Media said six bombs went off and a witness saw three dead people and a gunfight going on.

-Agencies