Russians seek answers to central Moscow GPS anomaly

Joggers, taxi drivers, players of Pokemon Go and senior Russian officials are seeking an explanation of why mobile phone apps that use GPS are malfunctioning in central Moscow.

A programmer for Russian internet firm Yandex, Grigory Bakunov, said Thursday his research showed a system for blocking GPS was located inside the Kremlin, the heavily guarded official residence of Russian President Vladimir Putin.

Users of GPS have complained on social media in recent months that when they are near the Kremlin their GPS-powered apps stop working or show them to be in Moscow's Vnukovo airport, 29 kilometers (18 miles) away.

The problem has frustrated those requesting taxis...