Pullman police began searching for an arsonist after a fire destroyed a laser tag arena on Sunday, the same day a device resembling a pipe bomb was discovered in a city park.
Days earlier, another improvised explosive was found in a mobile home just across the state line in Moscow.
No arrests have been made in connection with any of the three incidents, and it’s unclear if they are related.
“We’re asking the same questions,” Pullman police Cmdr. Chris Tennant said Monday. “We don’t have any answers yet.”
The fire at the Cougar Laser Arena on South Grand Avenue was started sometime before 2 a.m. Sunday.
A fire department paramedic spotted smoke as he passed the building while returning from Pullman Regional Hospital, Mayor Glenn Johnson said in a news release.
After firefighters doused the blaze, investigators found several ignition points inside the building, as well as evidence of vandalism, Johnson said.