New Delhi, May 1 (PTI) : In a fresh advisory, the US on Saturday warned of "imminent" terror attacks in New Delhi, particularly in market places like Connaught Place, Greater Kailash and Chandni Chowk, which are "attractive targets" for terrorist groups.

"This Warden Message provides updated information related to the April 21, 2010 Warden Message and additional information related to the Travel Alert issued for India on April 16, 2010," said the renewed advisory primarily intended for American citizens in India.

It said there are "increased indications that terrorists are planning imminent attacks in New Delhi."

The advisory noted that terrorists have targeted places in the past where US citizens or Westerners are known to congregate or visit.

"Markets such as those located in Chandni Chowk, Connaught Place, Greater Kailash, Karol Bagh, Mehrauli, and Sarojini Nagar, can be especially attractive targets for terrorist groups," the advisory said.

It advised American citizens that if they are in an area where unattended packages are spotted, they should immediately exit the area and report the packages to authorities.

"Americans travelling or residing in India are strongly encouraged to maintain a high level of vigilance, remain aware of their surroundings, monitor local news reports, and take appropriate steps to bolster their personal security," it said.