Usually packed Eurostar trains from London to Paris were virtually empty on Saturday morning in the wake of Friday's attacks on the French capital.
A normally packed Eurostar empty but for journalists this morning #ParisAttacks
While services were initially halted on Friday night, they were running as normal on Saturday morning.
Services that were said to be fully booked, however, were boarded by only a handful of travellers, including journalists traveling to Paris to report on the attacks.
On the Eurostar to Paris - staff say only a quarter of ticket holders showed up this morning
Those waiting to board trains at Eurostar's London terminal at King's Cross St Pancras early on Saturday described being "jittery", according to the New York Times, while others were unwilling to let the threat of terrorism disrupt their plans.
"I woke up this morning feeling afraid," Solenn Le Daniel, a woman from Brittany living in London who was travelling to Paris to visit family told the NY Times. "The images are horrible. My dad called me from France and told me to avoid the Métro and restaurants."
On Eurostar to #Paris to cover #Parisattacks - train that was fully booked is pretty much empty
Eurostar said that although services from London to Paris were running as normal, they would offer a free exchange to anybody who no longer wished to travel.
At Gare Du Nord station in central Paris, a stone's throw from where the restaurant and theatre attacks took place, trains were greeted by armed police, with security at the station stepped up as the French government declared a state of emergency.
Flights in and out of Paris's Charles de Gaulles airport also continued as scheduled, with large queues forming due to extra security checks required by the French government.
What a Charles de Gaulle airport looks like in the aftermath of #ParisAttacks. Mood: tense and eerily hushed.
British Airways told BuzzFeed News flights would depart as scheduled while they continue to monitor the situation, but said customers who did not wish to travel could postpone flights to any day in the next two weeks.
The British Foreign Office advised Britons travelling to France to "exercise caution in public places" as the French government had suggested people stay indoors where possible.
"Systematic border control checks have been implemented at all entry points into France," the Foreign Office added in a statement.