https://cdnph.upi.com/ph/st/th/7801784213373/2026/upi/eb1d945eb96ed19663786f8a76a2beb9/v1.5/UN-2-boats-fleeing-Myanmar-are-missing-500-Rohingya-believed-dead.jpg" /> About 500 people aboard boats heading to Bangladesh from Myanmar are feared dead after the vessels disappeared, two United Nations agencies said.