LYNN – A Lynn teen has been arrested in connection with a series of explosions that terrorized city residents on Monday.Michael J. Ranelli, 18, of 45 Piedmont St., was charged with hiding, placing, throwing or launching of an explosive, destructive device or substance and unlawful possession or control of explosives or substances that can be used to create a destructive or incendiary device.Both charges are considered felonies and he is expected to be arraigned today at Lynn District Court.Lt. William Sharpe said the investigation remains ongoing and did not release any further information as of press time Thursday.Earlier this week, police and fire investigators offered a bounty of up to $5,000 for information on three people involved in explosions on Bowler Street, Conomo Avenue, York Road and one near the Peabody-Danvers line. Sharpe did not say if a reward had been doled out in regards to Ranelli’s arrest, but did say that he is a suspect in the Bowler Street and York Road incidents.Officials say the four explosions, which happened between 12:30 a.m. and 2 a.m., did not fit any discernible pattern.Lynn Arson investigator Donald Baron described the device found on Bowler Street as a four-inch long cardboard tube with a three-inch diameter packed with flash powder. Tyler Hudson, a resident of 6 Bowler, discovered the device shortly after midnight when he heard an explosion outside his home near Flax Pond and quickly ran outside, throwing water on the “glowing fragments.”Another Bowler Street resident spotted a man in his 20s wearing a gray sweatshirt, who jumped into a silver Honda Accord with two other people inside, who left the area as soon as Hudson went outside.Then, on Tuesday, police and firefighters went to 52 Pond St., on a report of a suspicious device found by a man picking through trash bags. The device – two water bottles duct taped to a piece of wood with batteries and wiring, turned out to be a school science project undertaken by the homeowners brother-in-law and nephew.So far, investigations into Monday’s four explosions indicate that there is no link between those blasts and a detonation last October that happened on Essex Street near the Swampscott line.Anyone with information is urged to call the police at 781-595-2000 or the arson squad at 781-599-0232.