MUMBAI, India --
Four men are being sought in India's financial capital. According to officials, the men are suspected of entering Mumbai to carry out a terrorist attack. The men are said to belong to a Pakistani militant group. It's the same group that carried out the 2008 siege in Mumbai, which left 166 people dead.
Police said the threat is "very serious."
On Friday, police set up checkpoints along major roads in the city, put additional men on patrol duty at public places and released computer photographs of the four suspects.
The Associated Press contributed to this report.