Bangladesh's navy has joined the search for a ferry that sunk in flood-swollen river waters Tuesday, killing more than 500 people.
A naval ship equipped with sophisticated sonar was deployed Saturday in an effort to locate the ferry, which is believed to be buried beneath 60 meters of water. The overcrowded boat sunk in strong currents at the convergence of the Meghna, Padma and Dakatia rivers, near Dhaka.
Officials say about 200 people survived the disaster. The ship, which was licensed to board 350 people, was believed to be carrying more than 700 passengers, many of whom are still missing.
Victims relatives have anxiously been waiting along the river bank for news of their loved ones, but heavy monsoon rains and strong winds have slowed search efforts.