A home-made bomb went off early on Sunday in the courtyard of a pensioner's house in the town of Ordzhonikidzevskaya in the Sunzha district. No one was injured in the blast, the police source said over the phone.
However, when a police squad arrived at the scene, a second bomb exploded, leaving seven police officers shell-shocked, the police source said.
Ingushetia has seen a rise in violence in recent months linked to separatists in neighboring Checnhya and internal power struggles.
On Monday, unknown assailants launched grenades and fired automatic weapons at a police official's home in the village of Inarki, Malgobek district, but no one was injured in the attack.