Fishermen in a remote area of Northern Canada have heard strange pinging noises that couldn’t be explained. The Canadian military have investigated too, and they’re not been able to find the source of the noise.

The pinging noise seemed to come from the seabed in the Fury and Heda Strait, about 120km from the village of Igloolik, in the Nunavut Region.

A local legislative assembly member visited the area, but didn’t hear the noise. However, he did notice there were no whales or seals in the sea, where normally it would be full. And the Canadian military also investigated, but found no evidence of any foreign submarines in the area.

The pinging remains unexplained.