POMONA (CBSLA.com) — Foothill Transit mechanics went on strike Monday, affecting 19 bus lines throughout the east San Gabriel Valley.

Mechanics represented by Amalgamated Transit Union Local 1756 have reportedly been unable to reach an agreement with the new company, Keolis Transit America, which took over Foothill Transit recently.

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The work stoppage went into effect at Foothill Transit’s Pomona operations facility, where both bus maintenance and bus operation have stopped. Lines 195, 197, 282, 285, 286, 289, 291, 292, 482, 486, 488, 492, 495, 497, 499, 699, 853, 854, and 855 were affected by the strike.

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To help offset the affected bus lines, extra westbound trips were added to Line 498 and the Silver Streak in West Covina. Additional service will also be provided on Line 493 out of Industry Park & Ride.