India ? An Indian investigator Saturday blamed Pakistan’s spy agency for orchestrating the July train bombings that killed at least 207 people in Mumbai, an accusation that could threaten the already shaky peace process between the nuclear-armed neighbors.

Pakistan’s minister of state for information, Tariq Azim, immediately denied the allegation, calling it “irresponsible” and demanding that India provide evidence of the link.

India called a halt to the often-stumbling, 2-year-old peace talks with Pakistan in the wake of the bombings, which ripped through a series of suburban commuter trains during evening rush hour on July 11.

Negotiations resumed earlier this month when Indian Prime Minister Manmohan Singh met Pakistani President Gen. Pervez Musharraf on the sidelines of a conference in Cuba.