Furuvik, Sweden - Zookeepers at a Swedish zoo on Friday managed to reach several chimpanzees that had escaped from their enclosure to provide them with food, water – and some hot cocoa. Others, though, were not so lucky.

Several of the park's seven chimpanzees had escaped from their enclosure and the chimpanzee house on Wednesday.

On Friday, the keepers and a veterinarian sealed off part of the chimp house where four of the apes ended up, the Swedish news agency TT reported.

Staff provided them with food and warm drinks.

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"They like hot chocolate, so that's what they'll get," said Annika Troselius, head of communications at Furuvik Park near Gävle, some 90 miles north of Stockholm.

The keepers also wanted to set up fan heaters in the chimpanzee house, as the animals had opened windows and doors. It marked the end of a somewhat tragic episode.

After Wednesday's break-out, three chimps had to be shot for safety reasons, according to the park.

A fourth was injured and made it to the chimpanzee house, but communications chief Troselius wasn't optimistic about his survival chances.

"We used drones to see three chimpanzees running around the house in the morning," she told TT. "Unfortunately, we could see that one chimpanzee was still lying on the ground. So far we haven't been able to get close enough to him for the vets to assess the injury, but for a chimp to lie there for so long is not a good sign."

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Though the four remaining animals are in the chimp house, they're not locked in their enclosure. This means that visitors are not yet allowed to move freely in the park.

Exactly how the animals were able to escape remains unclear as yet.