LOS ANGELES — Crystal Cruises is rerouting two of its upcoming voyages set to call in Turkish ports in response to ongoing security concerns for travel within Istanbul.

The cruise line has revised the itineraries for Crystal Symphony’s April 24 and May 1 sailings, previously planned to include visits to Istanbul and Kusadasi, replacing those ports with Greek destinations.

“The safety and peace of mind of our guests are our primary concerns, and we do not take any risks with either,” says Crystal CEO & President, Edie Rodriguez. “The itinerary changes will allow our guests to continue with their planned vacations in the same standard of excellence and luxury, without the added worry of security in a particular destination.”

Turkish ports of call scheduled for April and November aboard Crystal’s new luxury yacht, Crystal Esprit, will also be changed, though the new itineraries have yet to be finalized. Effective immediately, the voyages will reflect the following itinerary changes (*=newly changed destination):

April 24 – Athens/Piraeus, Mykonos, Santorini, Rhodes, *Souda Bay/Chaina, *Navplion (overnight), *Hydra and *Athens/Piraeus (overnight), Greece.

May 1 – *Athens/Piraeus (overnight), *Patmos, *Rhodes, Mykonos, Santorini, Navplion and Argostolios, Greece; Crotone, Sorrento and Rome/Civitavecchia, Italy.

For both sailings pre-reserved Crystal Adventures will automatically be cancelled, while the line is in the process of developing a host of new excursions ashore, which will be available in the online Guest Check-In/Priority Check-In & Planning Center (PCPC) at crystalcruises.com.