The New York Police Department made public the names of some of the people involved in a seemingly random knife attack on a crowded Manhattan street, but questions remained. Erin Piacenti died after an afternoon peak hour attack in Manhattan that injured another victim. Key points and original sources are listed below.

• The New York Police Department made public the names of some of the people involved in a seemingly random knife attack on a crowded Manhattan street, but questions remained.S1

• Erin Piacenti died after an afternoon peak hour attack in Manhattan that injured another victim.S2S3