Barcelona, Spain

(6 a.m. EDT) -- A van attack in Barcelona's popular Las Ramblas pedestrian thoroughfare occurred after most cruise lines had already left the Spanish port yesterday.

Both Royal Caribbean's Brilliance of the Seas and P&O's Britannia were en route to other Mediterranean port calls when the deadly incident took place.

TUI Discovery 2 was still at the port. In a statement, the British cruise line said all passengers and crew who had been in the city at the time of the attack were accounted for. The ship delayed its sailing until 10 p.m. Friday excursions into Barcelona have been canceled for people who are sailing on TUI Discovery, which docks in Palamos tomorrow, as well as customers staying at resorts as part of the company's resort-based program.

Two cruise lines, Oceania and MSC Cruises, are expected to call at Barcelona today.

Neither has plans to alter its itinerary. Oceania said in a statement: "Oceania Cruises is monitoring the situation in Barcelona and our thoughts and prayers go out to all those affected. The safety and security of our guests and crew is our top priority.

"We have strict safety protocols in place and cooperate with local authorities regarding security matters at the destinations our ships visit. Port and onshore facilities, infrastructure, and passenger security and services in destinations are strictly scrutinized prior to a ship call.  In the event of any safety concerns, we have the flexibility to alter our itineraries as needed to avoid areas of concern."

Meanwhile, a spokesperson for MSC said: "In the wake of yesterday’s attack all MSC Cruises shore excursions due to take place in Barcelona today have been cancelled. The safety of our guests and crew is our top priority and we are working closely with the local authorities to ensure this."

Disney Cruise Line has not altered plans for its ship, Disney Magic, which is slated to be in Barcelona Saturday.

Cruise Critic will continue to monitor the situation and report any changes as a result of the attack.

--By Chris Gray Faust, Senior Editor