Arson/bomb-squad investigators are trying to determine who left an incendiary device at a Southeast Seattle bank early Friday.

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Seattle police arson/bomb-squad investigators and the FBI are trying to determine who left an incendiary device at a Southeast Seattle bank early Friday.

The device, which one witness described as two bottles wrapped in tape in a box with wires, failed to ignite. Seattle police are calling the incident an attempted arson.

Police spokesman Mark Jamieson said that someone who apparently saw the device inside the secure ATM area at the Chase Bank, at 7100 Martin Luther King Jr. Way S., flagged down a patrol officer at 6:37 a.m.

The device was inside an area only accessible by customers with an ATM card, police said. Police arson/bomb-squad investigators collected the device and “rendered it safe,” according to a news release.

Police spokesman Sgt. Sean Whitcomb said investigators are reviewing bank-surveillance video. Police are also investigating a substance found in the bottles, he said.

Seattle Fire Department spokesman Kyle Moore said there have been no similar incidents recently. The Fire Department’s hazardous-material team responded to the bank, as well as other firefighters.

Darcy Donahoe-Wilmot, spokeswoman for Chase Bank, said the bank is cooperating with police and the FBI.

Sound Transit’s light-rail service to Othello Station was disrupted during the investigation.

Anyone with information about the device is asked to call the Arson and Bomb Investigation office at 206-684-8980.

Jennifer Sullivan: 206-464-8294 or jensullivan@seattletimes.com

Information from The Associated Press is included in this report.