CNN —Flowers, a coconut and a round of cheers were part of the celebrations following the inaugural test run through India’s first underwater metro tunnel on Wednesday. “This is a historic moment for Metro Railway,” Kausik Mitra, chief public relations officer for the Kolkata metro system, said in a statement. Once open, Howrah Maidan will be the deepest metro station in India. The full metro line through Howrah Maidan will be 4.8 km (three miles) long. Kolkata was the first city in India to have a metro system.

---