The spate of violent incidents in the Middle East and Asia, culminating in the 12 October bombing in Bali that killed some 200 holidaymakers, has been seen as a sign of renewed activity by the Al-Qaeda network. Indonesian police have focused their investigations on Islamist groups thought to have connections with Al-Qaeda. The group is also suspected to have been involved in the 6 October explosion on the Limburg tanker off the Yemeni coast, and in an attack two days later on US marines in Kuwait.