The Puyallup Police Department is conducting an ongoing investigation into the unsolved bank robbery that occurred just after 5 p.m. Dec. 21 at Heritage Bank on South Hill.

“It remains an active investigation for us, but this is one case where the department really needs help from the public,” said Capt. Scott Engle of the Puyallup Police Department.

The suspect entered the bank in the 4600 block of South Meridian wearing a black knit mask and a black knit coat with darker cargo-style pants. Engle said the man also wore a distinctive glove on his left hand.

Investigators believe they are looking for a white male about 6 feet to 6-foot-3 who may weigh more than 200 pounds.

Within five minutes of entering the bank, the man fled the scene on a bicycle on southbound Meridian with an undisclosed amount of money after he demanded $10,000 and threatened to ignite a bomb.

“This was a fairly aggressive bank robbery,” Engle said. “He came into the bank with a mask and making demands the minute he entered the building.”

No customers were in the bank at the time. No injuries were reported.

Because it’s a federal crime, Engle said the FBI is involved with the case. Ayn Dietrich, the FBI public affairs officer assigned to the case, said the FBI likely won’t pursue federal charges since no weapon was involved.

The Heritage Bank robbery is the third reported bank robbery in the past two years, according to police records. Bank of America, at 205 W. Meeker, was robbed on Aug. 24, 2011. Police arrested a suspect two months later, and the person confessed to six bank robberies.

In 2012, police records showed two bank robberies: one on Oct. 22 at Ace Cash Express, 4121 S. Meridian, and the other at Heritage Bank. A suspect was arrested for the Oct. 22 robbery.

Engle said any information the public can provide in the latest case would be helpful. The Puyallup police tip line is 253-770-3343.