New York: Authorities are investigating as bias crimes attacks at four locations in New York, including an Islamic centre and a Hindu place of worship, in which Molotov cocktails were hurled at the sites damaging property.

The attacks took place in Queens near here on Monday night in which unidentified assailants threw homemade firebombs at a house which was being used for Hindu worship services, Islamic centre Imam Al Khoei Foundation, home and as a convenience store.

No injuries have been reported so far, police said.

New York Mayor Michael Bloomberg called such attacks unacceptable and said authorities are investigating the incidents.

"No matter what the motivation was of the individual who threw Molotov cocktails in Queens on Monday night, his actions stand in stark contrast to the New York City on Tuesday that we’ve built together," he said in a statement.

Governor Andrew Cuomo said such attacks have no place in "our open and inclusive society and we must do all we can to ensure New York remains a safe and tolerant place for all."

Personnel from the New York Police Department’s Hate Crimes Unit and detective squad are "moving at full steam" to investigate and determine if there are any connections to incidents outside New York City.

A Fire Department official said the attacks damaged property but no one was injured.

Police said in three of the four attacks, Molotov cocktails were made using Starbucks bottles.

The first attack took place on Monday night in a convenience store, also known as a Bodega. 10 minutes later, a crude firebomb was thrown at a home, which caught fire, the Islamic centre  including a Hindu place of worship.

The Imam Al-Khoei Foundation has one of the most prominent Shia mosques in New York.

According to information, the centre provides education, funeral services, counseling as well as helps organise Hajj pilgrimages. It has branches in several cities, including in Montreal and Islamabad.

Police said the Hindu place of worship was a private home that was being used by a Hindu priest for ceremonies, adding that from the outside the house did not look like a temple.

An Imam at the Islamic centre said about 80 people were gathered there when the firebomb was thrown inside, shattering the glass.

He said the foundation promotes work in development, human rights and minority rights as a general consultant to the Economic and Social Council of the United Nations.

The center also has a school that will resume on Tuesday after a holiday break.

Police investigating the attacks as hate crime, said callers informed them that they saw the assailants fleeing the scenes after hurling firebombs.

They were looking at surveillance video obtained from the bodega and the attack on one of the houses.

The Islamic centre said that two firebombs were "hurled at the main entrance" but "no major damage or injury was caused by the blast."

It said the foundation "reiterates its resolve to continue to serve the community and to strive to bring love where there is hatred, light where there is darkness and enlightenment where there is ignorance."

Security around religious centers beefed up

American police erected a security tower and stepped up surveillance around an Islamic centre and a Hindu temple that were among four sites fire- bombed here in arsonist attacks termed by authorities as hate crimes and also released the sketch of a suspect.

Molotov cocktails were hurled at the four locations last night, with bombs damaging property but no serious injuries were reported.

The attacks took place in Queens area in which unidentified assailants threw homemade firebombs at a house used for Hindu worship services, Islamic centre Imam Al-Khoei Foundation, a home and a convenience store.