At least four people were arrested in Athens on Saturday as part of a probe into a jihadist cell that was dismantled in Belgium this week before it could carry out any attacks, a Greek police source said.

Greece's anti-terror police were seeking to determine whether those arrested included Abdelhamid Abaaoud, the 27-year-old suspected mastermind of the cell who according to media reports may have been planning the foiled attacks from Greece.