The siege of Sidney Street of January 1911, also known as the Battle of Stepney, was a gunfight in the East End of London between a combined police and army force and two Latvian revolutionaries. The siege was the culmination of a series of events that began in December 1910, with an attempted jewellery robbery at Houndsditch in the City of London by a gang of Latvian immigrants which resulted in the murder of three policemen, the wounding of two others, and the death of George Gardstein, a key member of the Latvian gang.