TENTENA, Indonesia, May 28 (Reuters) – Two bombs tore through a busy market in a predominantly Christian town in eastern Indonesia on Saturday, killing up to 21 people in an attack that raised fears that sectarian bloodshed could again break out in the region.

The explosions, 15 minutes apart, took place in the lakeside town of Tentena, on the eastern island of Sulawesi, part of an area where three years of Muslim-Christian clashes killed 2,000 people until a peace agreement was reached in 2001.