NYC Mayor rides subway after stabbing attacks

New York City Mayor Bill de Blasio rode on a city subway train on Monday night and spoke with NYPD (New York Police Department) officers.

The Mayor said he wanted to assure residents that the subways are safe after recent stabbing attacks on the subways.

"We have thousands of NYPD officers out normally protecting people in the subways, we're adding 500 more immediately. We're going to do whatever it takes," de Blasio said.

A man charged with stabbing four people, two fatally, in the New York City subway system was ordered held without bail Monday.

Rigoberto Lopez was arraigned on murder and attempted murder charges. A court complaint said he confessed to the attacks.

One victim was discovered dead on a subway train in Queens late Friday with several stab wounds to his neck and torso, police said.

Two hours later, a 44-year-old woman, Claudine Roberts, was found stabbed to death in a subway car in upper Manhattan.

Lopez is also charged in two other attacks in upper Manhattan subway stations late Friday and early Saturday.

The victims, both men, survived.

Authorities believe all four victims were homeless.

Police leaders said they would deploy an additional 500 officers into the subway system to guard against future assaults.

Transit officials are asking for another 1,000 officers.