The Vancouver International Airport is stepping up security in response to a deadly suicide bombing in Turkey.

Dozens of people have died in the attack at Istanbul's Ataturk Airport, an act blamed by the government on Islamic State extremists. ISIS has not confirmed whether its members were involved in the attack at the travel hub.

Transport Canada has not changed the security threat level in the country, which remains at "medium," YVR's acting vice-president of operations told CTV News on Wednesday.

"But we still have increased a little bit of the security and procedures at the airport," Don Ehrenholz said.

Security was made tighter in March, following an attack at an airport in Brussels. The increases now in effect are "another little notch up," Ehrenholz said.

"This is just a heightened presence to make sure that nothing bad could possibly happen."

The increase in security comes at a critical time for the airport, which is in its busiest 100 days of travel as summer begins. More than 6.2 million passengers are expected to pass through the airport between June and August, officials estimate.

During the summer months, passengers can expect to see bigger crowds and longer lines with more people for security to monitor.

In addition to the increase in security, many flights from Canada to Istanbul have been cancelled. Canada's foreign offices in the city and in Ankara are closely monitoring the situation.

With a report from CTV Vancouver's Scott Hurst