From 24/7 News Source:
(Undated) -- Mick Jagger is taking to Twitter to tease the upcoming possible release of new Rolling Stones songs. Jagger uploaded yesterday a video of him playing bluesy harmonica in the studio, with the caption, "Harmonica playing on new tunes!" The post fueled speculation the band is in the studio working on its first album of original songs in 13 years. The group's latest album was 2016's blues covers collection Blue & Lonesome.