Prince Salman bin Hamad Al Khalifa performed prayers at Shaikh Isa Mosque, in Riffa, to pay tribute to the brave Bahraini soldiers who lost their lives in the line of duty along the southern border of Saudi Arabia.
Bahrain's Deputy Chief of Public Security said forensic teams had visited the site of the blast and an investigation was launched.
Iran-backed rebels fired Katyusha rockets at a busy market in Yemen's eastern city of Marib killing at least 20 people on Friday, medics and witnesses said.
Palestinian President Mahmud Abbas is scheduled to speak to the world body on September 30.
So far, the group's presence in the kingdom appears to be in a low-level stage, but it has claimed four significant bombings since May, one of them in neighbouring Kuwait.
Technology helps create low-cost stethoscope.
Investigations have been initiated by the competent authorities, the Bahrain Ministry of Interior has said.