Explosions in Islamabad and New Delhi are still being investigated, but finger-pointing has already begun and threatens to escalate simmering cross-border conflict.

A car bomb rocked Islamabad, Pakistan, on Tuesday, just one day after a car exploded in New Delhi, India. CBS News' Shanelle Kaul has more.

The accusation came as India’s prime minister vowed to find the perpetrators of a separate deadly explosion on Monday.

Deadly blast near Delhi’s Red Fort kills 8, injures 20; police invoke anti-terror law as forensic teams comb the wreckage. (ANI via Reuters.)

Indian authorities are investigating a deadly car explosion in New Delhi on Monday that killed at least eight people as a possible terrorist attack, according to a police official. The blast near a metro station by the historic Red Fort injured at least 20 others and set several nearby cars on fire,

India has classified a deadly car blast that killed eight people and wounded at least 20 in the capital Delhi on Monday as a "terrorist incident", according to a resolution passed by the country's federal cabinet of ministers.

The explosion occurred close to the historic Red Fort in New Delhi. Authorities have not determined the cause of the blast, but senior police officials told The Associated Press t