The UN Security Council has strongly condemned the triple bombing in the Indian city of Mumbai that killed at least 21 people and wounded some 140.
U.S. President Barack Obama also condemned the attacks and offered support to bring the perpetrators to justice.
The blasts came minutes apart from one another. No one has claimed responsibility.
Pakistani President Asif Ali Zardari and Prime Minister Syed Yousaf Raza Gilani swiftly condemned the blasts.
India's home affairs minister says investigators have no immediate leads as to who was behind the bombing.
Palaniappan Chidambaram told a news conference that the blasts in three separate neighborhoods were "a coordinated terror attack." He says there were no intelligence warnings of a possible attack.
New Delhi has accused groups in Pakistan of training militants to carry out attacks against India, a claim Islamabad rejects.
compiled from agency reports