Police are asking for the public's assistance in identifying the individuals wanted for questioning in the five assaults.
Violent crime dropped nationwide for the third consecutive year and the Big Apple kept its spot as the country's safest large city, officials said Monday.
"Although there are many reasons behind the decline, one thing is certain: smarter policing practices and investments in law enforcement play a significant role in reducing violent and property crime," said Attorney General Eric Holder.
In New York City, the total drop in violent crime was just over 4 percent but the nearly 10 percent fall in murders outpaced national trends. Last year ended with 471 homicides in the five boroughs, a level more attune to the days when John F. Kennedy was president. By comparison, Chicago had 458 murders last year -- but New York city is almost three times as large as the Windy City.
Property crime also fell in New York City last year -- by 5.3 percent , which was better than the 4.6 percent fall in such crimes nationwide.
"The men and women of the NYPD have found new ways to further drive down crime, even when faced with tough economic times and the threat of terrorism," said Mayor Michael Bloomberg.
New York city officials say that the Big Apple ranks 248th among the 266 American cities with populations larger than 100,000.