In the aftermath of the Boston Marathon bombings, D.C. United has implemented greater security measures at RFK Stadium ahead of Sunday’s match against the Philadelphia Union.

“Fans should plan accordingly for timely access into the stadium,” United executive Doug Hicks told the Insider on Friday.

He did not want to specify what changes have been made by the club and EventsDC, which operates and manages the stadium.

The message, though, was clear: It might take a little longer to pass through the gates. A larger security presence in the parking areas also seems likely.

Verizon Center implemented tighter security at the Washington Capitals game Tuesday. After the NHL game, the Associated Press reported:

“Security was increased at the Verizon Center, although mostly behind-the-scenes and so subtly that many noticed little or no difference as they endured the usual bags searches and screenings by hand-held metal detectors. Arena workers said there were extra security patrols, specifically checking trash cans and security cameras before the building was open to the public.”

Increased security was evident throughout the week at RFK. Internal roads on the stadium campus were restricted and guests at the administrative entrance were met by a security guard. The stadium, which is a government-owned facility, had been using an intercom system to admit visitors.

As of Friday morning, United had sold more than 11,000 tickets to Sunday’s game, an indication attendance will reach 13,000 to 14,000. Through three home matches, United has averaged 15,375.