Pirates armed with automatic rifles boarded a liquefied petroleum gas (LPG) tanker off the coast of Indonesia on July 26. Despite opening fire at the crew, no one was unhurt in the attack in the Anyer anchorage on the Sunda Strait, between Indonesia’s Sumatra and Java islands.

In its latest weekly report, the International Maritime Bureau (IMB) said the five men escaped.

Amid growing concerns of high-sea piracy and threat to their maritime security, Indonesia, Malaysia and Singapore last week signed an agreement to step up patrols in the Strait of Malacca, one of the world’s busiest waterways.

The IMB said more than 25% of piracy incidents occurred in Indonesia during the first half of the year with 50 incidents. Pirates killed 30 seafarers globally during the period, compared to 16 over same period last year.