Yukon Wildland Fire Management crews extinguished seven separate human-caused blazes in the territory Tuesday, including five likely started by someone playing with matches in Mayo.

Those fires, along with one in Whitehorse and one in Carmacks, were all burning within a kilometre of structures, officials say.

"These fires are an obvious concern, given their location and the fact they were human-caused,” duty officer Lorne Harris said today.

"It's fortunate our staff was able to extinguish these fires without further incident.”

The five fires in Mayo were found at approximately 9:30 p.m. Tuesday near the Mayo Bridge.

It appears they were set by someone playing with matches, fire information officer George Maratos said, though officials are still investigating.

The fires were relatively small and did little damage.

"There have been eight suspicious human-caused fires this summer, all in this same area,” said Mayo duty officer Scott Hamilton.

"Given their location to the community, it is a serious problem, and today fire officials and RCMP will be posting signs asking the public to be responsible with any burning and keep an eye out for any suspicious activity.”

The other two fires were reported earlier in the day.

The first one was discovered at 3 p.m. Tuesday in the Carmacks district near Twin Lakes.

It was the result of a campfire not having been properly extinguished, and was only about 0.1 hectare in size.

The second fire was located in the Whitehorse district near the Cousins Airstrip at around 4:15 p.m.

Reported by a member of the public, it was again the result of a campfire not having been fully extinguished.

So far this season, there have been 105 fires in the territory to date, burning approximately 75,950 hectares.

Meanwhile, an air tanker group with Wildland Fire Management provided support to the British Columbia Forest Service Tuesday evening to fight a fire 40 kilometres south of Watson Lake.

If you see a wildfire, please report it immediately to 1-888-798-FIRE (3473).