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The Latest: Thai police find bomb-making materials in raid of 2nd apartment

In this Aug. 24, 2015, file photo, a man prays at the Erawan Shrine at Rajprasong intersection, the scene of the Aug. 17 bombing, in Bangkok, Thailand. Thai police probing Bangkok's deadly bombing said on Monday, Aug. 31, 2015, that they have discovered bomb-making materials during a raid of a second apartment on the outskirts of the capital. (AP Photo/Sakchai Lalit, File)

In this Aug. 24, 2015, file photo, a man prays at the Erawan Shrine at Rajprasong intersection, the scene of the Aug. 17 bombing, in Bangkok, Thailand. Thai police probing Bangkok's deadly bombing said on Monday, Aug. 31, 2015, that they have discovered bomb-making materials during a raid of a second apartment on the outskirts of the capital. (AP Photo/Sakchai Lalit, File)  (The Associated Press)

The latest on the investigation in the Bangkok shrine bombing (all times local):

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10:30 a.m.

Thai police probing Bangkok's deadly bombing say they have discovered bomb-making materials during a raid of a second apartment on the outskirts of the capital.

National police chief Prawuth Thavornsiri said Monday that police found fertilizer, gun powder, digital clocks and remote-controlled cars whose parts can be used for detonation, among other items, during a raid over the weekend at an apartment in Bangkok's Min Buri district.

Prawuth said "these are bomb-making materials" and added that police are looking to issue three or four arrest warrants but declined to give more details.

Min Buri is near the neighborhood where police on Saturday arrested an unnamed foreigner and seized a trove of bomb-making equipment that included detonators and ball bearings.

Prawuth said Saturday the man's nationality is still not known. He said "we are very certain he's part of the network" that carried out the Aug. 17 bombing at Bangkok's Erawan Shrine that left 20 people dead and more than 120 injured.