OAKLAND — Investigators seeking answers in a string of massive fires at separate construction sites will offer a six-figure reward for the right information.

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Richmond fire reported near homeless camp by I-580 The federal Bureau of Alcohol, Tobacco, Firearms and Explosives has announced that it will pay $110,000 for information leading to the arrest and conviction of anyone responsible for starting three fires at construction sites in Oakland and Emeryville earlier this year and in 2016. The agency also released photos of someone they consider to be a person of interest.

The ATF posted pictures on its Facebook and Twitter sites on Saturday of an individual who appeared to be a man riding a bike and wearing a hoodie. They did not release any other information.

For now, the award does not apply to information about Friday’s massive four-alarm fire that ripped through a six-story building under construction two blocks from Lake Merritt. A national response team from the ATF is expected to arrive in Oakland on Monday to join the Oakland and Alameda County fire departments and local ATF investigators. The cause of the fire has not been declared.

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Crews continued to work Sunday morning to remove debris from the scene. On Saturday, workers brought down a burned crane, lowering it with a dramatic crash around 7:30 p.m. The crane’s removal allowed residents in The Grand apartment building at 100 Grand Ave. to return to their homes. However, glass and debris that fell Sunday from nearby 180 Grand led the city to order its evacuation until city staff can conduct additional safety assessments.

REWARD: Combined total of $110,000 for info leading to the arrest and conviction of those responsible for 3 fires in San Francisco bay area. pic.twitter.com/aFtsNrOob2 — ATF HQ (@ATFHQ) July 8, 2017

Most of the 700 to 900 residents displaced by the fire and the subsequent evacuations were still awaiting clearance to return home Sunday morning.

By Sunday evening, all nearby buildings had been cleared with electricity and gas service restored except 2343 Waverly Street and 2346 Valdez.

In a statement Sunday evening, city spokesman Sean Maher said the Red Cross, cooperating with developers Wood Street Partners and the Oakland Metropolitan Chamer of Commerce, were working to shelter some displaced people in hotels.

Maher also said that anyone impacted by the fire should contact the Red Cross at its Oakland administration offices at 3901 Broadway or call 510-595-4441 during business hours, and added that the city will update its own hotline at 510-238-2181.

Traffic in the area also remained limited. Police shut down Broadway to Harrison Street and closed lanes in both directions from Grand Avenue to 26th Street.

The latest fire contains many of the same characteristics as three previous ones that have ripped through construction sites in Oakland and Emeryville since July 2016. The ATF is offering its reward for information regarding all three.

The most recent happened on May 13 in San Pablo and destroyed a retail-apartment complex under construction at 3800 San Pablo Ave. That site was back under construction after a six-alarm blaze tore through it on July 6, 2016.

A five-alarm fire also gutted an apartment building under construction on Lester Avenue in the early morning hours of Halloween last year. That blaze sent flames more than 30 feet into the air.

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