Sports fans raced to their cell phones Friday to begin placing bets as the state allowed online sports wagering just days ahead of tipoff of the NCAA Tournament next week.

The start of online sports gambling came a little over a month after the state began allowing people to place wagers in person at the state’s three casinos — Encore Boston Harbor in Boston, Plainridge Park Casino in Plainville, and MGM Springfield in Springfield.

Lawmakers estimate that sports betting could generate about $60 million in annual tax revenue and $70 million to $80 million in initial licensing fees, which must be renewed every five years. The law includes a 15% tax on in-person wagering and 20% tax on mobile wagering. People must be 21 or older to bet.

Belgium is banning TikTok from government phones over worries about cybersecurity, privacy and misinformation, the country’s prime minister said Friday, mirroring recent action by other authorities in Europe and the U.S.

The Chinese-owned video sharing app will be temporarily prohibited from devices owned or paid for by the Belgium’s federal government for at least six months, according to a post on Alexander de Croo’s website.

TikTok said it is “disappointed at this suspension, which is based on basic misinformation about our company.” The company said it’s “readily available to meet with officials to address any concerns and set the record straight on misconceptions.”