Greece has repulsed nearly 35,000 migrants trying to cross onto its territory illegally since Turkey opened its border nearly a week ago, government sources said on Thursday, as it prepares to deport hundreds of others who made it through.

Ankara has accused Greek forces of shooting dead four migrants, a charge rejected by Athens, which says Turkish forces are helping the migrants to cross the border. Both sides used tear gas at the Kastanies border post on Wednesday.