Officials fear the rapidly extending range of Somali pirates could soon see them approaching the headwaters of the Malacca Strait - one of East Asia's most important shipping choke points.
A senior regional anti-piracy official told a conference in Singapore that he was alarmed to see a string of Somali attacks off the Indian coast in recent months.
'We are very concerned about this,' said Nicholas Teo, who heads the Singapore-based information sharing centre under the Regional Co-operation Agreement on Combating Piracy and Armed Robbery Against Ships in Asia programme.
'We don't want them approaching the Malacca Strait ... and we are working closely with Indian authorities to monitor the situation.'
Some 10 pirate attacks or attempted attacks were logged off India in the last two months as Somali gangs increasingly use hijacked vessels as mother ships from which to launch attacks.
Once limited to vital Asia-Europe shipping lanes in the Gulf of Aden and around the Horn of Africa, the pirates are now routinely travelling across the Arabian Sea to within 300 nautical miles off India, reacting as ship captains ply new routes.