WASHINGTON — Serious crime on Metro is at a five-year low, according to Metro Transit Police.

In its 2014 annual security report, part I crime — or major crimes such as homicides, rapes and robberies — was down 27 percent, or about 5.2 crimes per million riders compared with the same 12-month period in 2013.

Transit Police attributed the reduction — which includes Metrobus, Metrorail and parking lots — to multiple factors: increased customer awareness and outreach; data-driven officer deployment tactics and improvements in technology, among other things.

In addition, the following crimes are down:

• Snatch theft of mobile devices by 52 percent
• Bicycle theft by 22 percent
• Robberies by 35 percent

Also, sexual harassment complaints were down 13 percent in 2014, according to Metro information.

“While we must still remain vigilant and never forget that one crime is one too many, it is important to thank our officers for their hard work, as well as Metro’s employees and customers for being part of the solution,” Metro Transit Police Chief Ronald Pavlik said in a news release.