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(CNN) — The Islamist terror group Boko Haram kidnapped at least 97 men and boys and killed 28 people this week in a raid on villages in Borno State in northeast Nigeria, a local leader and residents said Friday.

Boko Haram gunmen also injured 25 others during the raid in which scores of homes were burned, the sources said.

The gunmen raided the farming and fishing village of Doron Baga and surrounding villages on the shores of Lake Chad, about 110 miles north of the state capital, Maiduguri.

The raid and kidnappings occurred on Monday, but the news did not emerge sooner due to lack of communication and because cell phone towers were destroyed in previous Boko Haram attacks.