CAIRO, June 10 (Reuters) - Egyptian police shot dead a Sudanese migrant on Tuesday as he tried to slip across the border into Israel, police and medical sources said.

The man, named as Mohamed Taher Mersal, 30, was part of a group which refused to obey Egyptian police orders to stop. Police opened fire when the group ran off towards the Israeli side of the border, the sources said.

The police patrol detained three Sudanese from the same group, they added.

Egyptian police have killed at least 13 migrants this year as they tried to enter the Jewish state. Scores of others, mostly from Africa, have been detained.

London-based rights group Amnesty International says thousands of migrants try to cross into Israel from Egypt's Sinai peninsula each year, with numbers rising since 2007.

The migrants, including many from Sudan, are seeking work or asylum away from conflict at home and harsh living conditions in Egypt, where activists say African migrants face economic marginalisation and racism. (Reporting by Yusri Mohamed; Writing by Jonathan Wright)

AlertNet news is provided by