Dec. 3 (Bloomberg) -- Pakistan must act to help catch the perpetrators of last week's terrorist attacks in Mumbai that bore the hallmarks of an al-Qaeda-style operation, Secretary of State Condoleezza Rice said.

"I have said that Pakistan needs to act with resolve and urgency, cooperate fully and transparently," Rice told reporters in New Delhi today. "That message has been delivered and will be delivered to Pakistan." Later, she said the U.S. is especially concerned about the killing of its citizens in the assault, and would work closely with India on catching the perpetrators.

Rice, who met Foreign Minister Pranab Mukherjee, is using the U.S.'s newly elevated relationship with India to press its leaders to show restraint amid indications that Pakistani militants carried out the terrorist attacks. She arrived today in New Delhi at the request of President George W. Bush after terrorists killed at least 195 people, including six Americans, last week in Mumbai, India's financial capital. Prime Minister Manmohan Singh said terrorists couldn't destroy Indian unity.