Police have identified the shooter as Shane Tamura, a 27-year-old Las Vegas resident with a history of mental illness struggles, who ended the Monday evening massacre by shooting himself in the chest on the 33rd floor of a Park Avenue office tower.

U.S. and EU officials were still discussing steel and aluminum tariffs as well as digital services regulations following their framework announced on Sunday, Lutnick told CNBC in an interview, adding that talks with China were also "their own thing".