Deadly tsunami hits Indonesia, despite no quake

At least 20 people have been killed after a tsunami struck Indonesia, despite no quake being recorded.

The waves hit beaches around Sunda Strait on Saturday night (local time, Sunday morning NZ time), according to the Indonesian Disaster Mitigation Agency.

At least 165 have been injured.

The Indonesian Meteorology, Climatology, and Geophysical Agency said it may have been the result of volcanic activity at Krakatoa.

Sunda Strait lies between Java and Sumatra, connecting the Java Sea and Indian Ocean.

When Krakatoa erupted in 1883, more than 36,000 people died and world temperatures were cooler for the next year.