Shipments of refined crude from the port of Sohar are continuing, a port spokeswoman said after anti-government protests blocked roads leading to Oman's key industrial area.

She said the port shipped 160,000 barrels per day of a range of products from the Sohar refinery.

'It is true the protesters are making a very non-violent protest,' the spokeswoman told Reuters. 'Marine traffic in and out is not affected at the moment.'

Six people were killed after police opened fire with rubber bullets at protesters demanding political reform, hospital sources said.   

Earlier reports on Sunday had put the death toll at two.

The roads to Sohar is blocked by protesters and a supermarket has been set on flames, witnesses said on Monday. -Reuters