MUMBAI, India — Militants wearing army uniforms stormed an Indian air force base near the Pakistani border early Saturday, setting off a daylong battle in which five assailants and three Indian soldiers died, according to officials and media reports. Previous steps toward talks have also been met with violence, leading Indian officials to argue that some elements inside Pakistan’s powerful military and intelligence agencies are empowering militant groups in a bid to scuttle dialogue. According to Indian accounts, the assailants used the official’s cell phone to place a call to Pakistan that was intercepted by Indian intelligence, which issued an alert.