Peru ? Farmers freed 13 police officers and four civilians seized at a hydroelectric dam in Peru’s Andean region after local officials agreed Saturday to provide them with fertilizer.

Authorities said the hostages were held for nearly 24 hours at a church in Huallamayo, a town about 133 miles northeast of the capital, Lima.

Miguel Hidalgo, director of police, told radio RPP that talks involving government officials, the power plant company and farmer representatives produced agreement on releasing the prisoners. He said the government promised fertilizer would be delivered within 15 days.

Enersur, a French-Belgian company that operates the power station, said the dam’s electricity output was under 40 percent of normal because of damage inflicted by the farmers. It said a control room was destroyed a floodgate damaged.