Greek authorities have launched a search and rescue mission to locate two missing kayakers last reported between Sounio and Makronissos.
A navy vessel and a navy helicopter are involved in the search.
Strong winds of 6 to 7 Beaufort are blowing in the sea area increasing the difficulties of the operation,
The missing kayakers, two males in their 50s had left Sounio for Makronissos at 11 in the morning.
At 9.30 p.m. the Coast Guard was informed that they failed to return and were still missing.