A couple of cougar sightings have put a sleepy neighbourhood in North Vancouver, B.C. on high alert.

Andrew Smith of Deep Cove, B.C., said an adolescent cougar attempted to break into his home on Thursday.

"I look out the door and there's the cougar: completely calm, unfazed. (He was) trying to get in, trying to pull the handle. Then (it) climbs up … and tries to get into the window," Smith told CTV Vancouver.

Smith snapped some photos of the big cat and called B.C.'s Conservation Officer Service. The agency hunted it down and killed the animal later that day. It said that relocation was not an option.

"There was very threatening and aggressive behaviour noted … (It is) very unusual," said Sgt. Todd Hunter of the Conservation Officer Service.

But on Friday, the cat was back. Or it was another cat. Smith's family spotted a second cougar outside their home.

"When I looked out my kitchen window he was sitting at the stairs at the kitchen window," said Jessica Smith.

Warning signs about the cat have been posted in the area, and Hunter believes that the two animals were likely siblings.

"The other cougar came right back to the area. It's probably looking for the other one," Hunter said.

Smith's photos of the incidents have put residents on high alert. "That shocked me. I've never seen anything like that," one man said.

Local Laela Ateah also said it was "sad" that one of the cougars was killed.

"It's mostly our fault that it had to get hurt. If it weren't for all these buildings and everything. It's just curious," said Ateah.

With a report from CTV Vancouver's Sheila Scott