With Pokemon fever sweeping the nation after the release of the smartphone app Pokemon GO, the Honolulu Police Department is issuing tips aimed at keeping gamers safe while strolling in parks, shopping malls and other areas in search of cartoon monsters.

The augmented reality game released last week is generating a swell of activity in Honolulu, with thousands of players called “trainers” playing the game, through which the phone’s GPS technology is used to find and capture animated creatures in real-world places.

Michelle Yu, a spokeswoman for HPD, advises gamers who cruise places, ranging from Ala Moana Center to Maunawili Falls, while playing the game to pay attention to their surroundings at all times and never play the game while driving, noting that using an electronic mobile device while driving is punishable by a $297 fine.

“Always look up while crossing streets or walking in parking lots, and don’t jaywalk or stop in the middle of the street or a driveway to catch a Pokemon,” she said in an email statement. “Stay in a group and don’t go into unfamiliar or isolated areas, especially at night.”

In Wyoming, a woman discovered a body in a river while trying to catch a Pokemon. And in Missouri, a group of teens allegedly used the game to stake out robbery victims.

In various areas nationwide, players have sustained bruises and other injuries from inattention to their environment.

Yu added that players should be careful to avoid trespassing or damaging other people’s property. “Let’s keep the game fun for everyone,” she said.

Recreational gaming, such as Pokemon GO, is not permitted at any of the 134 national cemeteries. The U.S. Department of Veterans Affairs is reminding visitors to conduct themselves in a dignified manner.

“We maintain these hallowed grounds as national shrines, committed to preserving the decorum and sanctity of them,” the VA said in a statement.

Jim Horton, director of the National Memorial Cemetery of the Pacific, said security stopped three teenagers playing the game Tuesday at Punchbowl. They left the grounds without incident.

He said it’s not the first time the cemetery had a problem with people playing an electronic game.

Pokemon GO’s predecessor game, Ingress, similarly involves players going to real-life places to play the game. In that case, Punchbowl had dozens of Ingress “portals” attracting players to the cemetery, but game maker Niantic last year agreed to remove all national cemeteries from the game.

Other recreational activities, such as bicycling or skateboarding, are banned at Punchbowl. “It’s that respect thing,” Horton said. “This is a place for people to come and honor veterans, not to come here and chase Pokemons.”

An employee at the USS Arizona Memorial said the facility, which reminds visitors at least three times during tours to keep their cellphones on silent, has not had any problems related to Pokemon GO. Memorial visitors are asked to refrain from using cellphones for communication of any kind. However, phones may be used for snapping photos.

In addition, the U.S. Holocaust Memorial Museum and Arlington National Cemetery are asking users to refrain from catching Pokemon creatures during visits.