The Metropolitan Police Department announced Wednesday that it has arrested the driver of a tour bus that struck and killed two women downtown on December 19. The driver was reportedly distracted by his cellphone at the time of the accident, according to court filings, the Washington Post reports.

The women were identified by police as 61-year-old Monica Adams Carlson and 85-year-old Cora Louise Adams, a mother and daughter who were reportedly in town to see the White House Christmas decorations. Carlson was the mayor of Skagway, Alaska, a town of just over one thousand people.

Around 9:40 p.m. on December 19, Carlson and Adams were walking across the street at the intersection of Seventh Street and Pennsylvania Avenue NW when the driver of a large tour bus turned left into the intersection and struck them. Both women sustained life-threatening injuries and later died at the hospital.

Police identified the arrested driver as 45-year-old Gerard Derrick James of Baltimore, Maryland. James has been charged with involuntary manslaughter.

James was operating a bus from Eyre Bus, Tour & Travel, a Maryland-based company, at the time of the incident. Melanie Hinton, a spokesperson for the American Bus Association, told the Washington Post earlier this month that Eyre “wishes to express our sorrow and sympathy” to Carlson and Adams’ families.

This post has been updated with information from court filings reported by the Washington Post.