During the warning strike, the Berlin S-Bahn, which is not affected by the strike, is increasing services on the S3 and S5 lines on Thursday and Friday. "On both lines, the rush hour service will also apply during the day on both days," the company announced on Wednesday. Accordingly, the S5 will run every five minutes between Mahlsdorf and Ostbahnhof from 6 am to 6 pm. "On the S3, additional trains run every 20 minutes between Karlshorst and Ostbahnhof between 6 a.m. and 6.30 p.m. to supplement the basic service," it said.