Christmas market revellers in two Canadian cities say they feel safe going about their shopping with basic security upgrades in place a day after a tractor-trailer drove through a similar gathering in the German capital, killing 12 and injuring dozens more.

Concrete barriers have been fixed near the entrances of The Toronto Christmas Market and Le Grand Marché de Noël de Montreal. Both attracted robust crowds on Tuesday despite warnings from security experts that attacks on so-called 鈥渟oft targets鈥 are nearly impossible to prevent.

鈥淭hese are very hard to stop simply because you never know who is going to do it, and there are a lot of targets out there,鈥 Ivan Eland, a security expert and senior fellow with the Independent Institute, told 麻豆影视 Channel.

Organizers in Toronto and Montreal confirm security efforts have been stepped-up, but insist they will not significantly interfere with the visitor experience.

Toronto Police declined to provide details regarding their presence at the market in the city鈥檚 Distillery District. A private security SUV was parked in front of the event鈥檚 main entrance in addition to the concrete barricades.

In Montreal, security officials are checking bags as patrons enter. A concrete barricade has been put in place, but only at one side of the market.

鈥淚 think it鈥檚 pretty safe here. Toronto is a safe place,鈥 said a shopper who spoke to CTV Toronto.

Toronto Christmas Market executive producer Mathew Rosenblatt said his security staff continue to evaluate protocols to keep people safe.

鈥淭hese conversations continue today and we are making adjustments and enhancements to some of our current measures in light of yesterday鈥檚 events.鈥

Meanwhile, forensics teams in Berlin continued to comb through smashed wooden kiosks and scattered holiday decorations on Tuesday.

Security around large public gatherings had been ramped up in major European centres since an attack in Nice, France saw more than 80 killed when a large truck drove through a crowd gathered for a fireworks display in July.

鈥淲e did increase security,鈥 said Berlin Police president Klaus Kand. 鈥淏ut we cannot turn Christmas markets into fortresses.鈥

With reports from CTV Toronto and CTV Montreal