Fireworks light up the sky during the first night of the Electric Daisy Carnival Saturday, June 17, 2017, at the Las Vegas Motor Speedway. Total attendance at the three night festival, the largest electronic dance music festival in North America, is expected to surpass 400,000. (Sam Morris/Las Vegas News Bureau)

Police and emergency crews were kept busy as 136,000 people attended the first night of the Electric Daisy Carnival at Las Vegas Motor Speedway.

There were 443 medical calls that required six to be transported to area hospitals. One employee was also transported for a pre-existing medical condition.

Police made 29 felony narcotic arrests and show producer Insomniac Productions said it ejected 118 attendees.

Two people were arrested on gross misdemeanor charges for battery on a police officer. Two misdemeanor arrests were made and five misdemeanor citations were issued by the Las Vegas Metropolitan Police Department.

There were three reported traffic accidents and five traffic citations were issued.

Because of construction on Interstate 15 near the Speedway, traffic delays of up to 90 minutes were reported as fans arrived for the first of three nights of EDC.

Organizers of the largest music festival in North America are reminding attendees to report any suspicious activity they might witness during the event that began Friday, less than a month after a deadly terrorist attack struck a concert in England.

Police in Las Vegas say no threats have been identified against the three-day Electric Daisy Carnival. Still, organizers want festivalgoers to be alert to their surroundings.

Maren Steiner with organizer Insomniac Events says festivalgoers "have to speak up if something doesn't look or feel right."

The annual festival at the Las Vegas Motor Speedway has drawn more than 135,000 people a night in previous years.

Hundreds of private security personnel, Las Vegas police officers, Nevada Highway Patrol troopers and other law enforcement officials are working at the venue.