However, as a consequence of the city's 1976 fiscal crisis, service had become poor and crime had gone up, with crime being announced on the subway almost every day. Additionally, there were 11 "crimes against the infrastructure" in open cut areas of the subway in 1977, where TA staff were injured, some seriously. There were other rampant crimes as well. For example, in the first two weeks of December 1977, "Operation Subway Sweep" resulted in the arrest of over 200 robbery suspects. Passengers were afraid of crime, fed up with long waits for trains that were shortened to save money and upset over the general malfunctioning of the system. The subway also had many dark subway cars. Further compounding the issue, on July 13, 1977, a blackout cut off electricity to most of the city and to Westchester. Due to a sudden increase in violent crimes on the subway in the last week of 1978, police statistics about crime in the subway were being questioned. In 1979, six murders on the subway occurred in the first two months of the year, compared to nine during the entire previous year. The IRT Lexington Avenue Line was known to be frequented by muggers, so in February 1979, a group headed by Curtis Sliwa began unarmed patrols of the train during the night time, in an effort to discourage crime. They were known as the Guardian Angels, and would eventually expand their operations into other parts of the five boroughs. By February 1980, the Guardian Angels' ranks numbered 220.