One of Pak's richest men Shahzada Dawood, his son onboard missing Titanic submarine

One of Pakistan's richest men, businessman Shahzada Dawood and his son, Suleman, are onboard the tourist submarine which has gone missing near the wreckage of Titanic, their family said in a statement. "We are very grateful for the concern being shown by our colleagues and friends and would like to request everyone to pray for their safety," the statement said.