From London to Sochi to Rio de Janeiro, the deadly bomb attacks on the Boston Marathon raised new concerns Tuesday over safety at major sports events around the world, including the Olympics and World Cup.

The twin bombings near the marathon finish line that killed three people and injured more than 170 people brought into sharp focus the security challenges facing next year's Winter Olympics in Sochi, Russia, the 2014 World Cup in Brazil and the 2016 Summer Games in Rio.

Wales will have two teams in next season's Premier League after Cardiff gained promotion to the lucrative top flight on Tuesday for the first time in 51 years.

Cardiff, which was playing in the fourth tier and suffering severe financial hardship only 11 years ago, guaranteed a top-two finish in the League Championship thanks to its 0-0 draw against Charlton.

The Los Angeles Lakers' locker room had several conspicuous absences Sunday night. Kobe Bryant was at home after surgery on his torn Achilles tendon, and Steve Nash hasn't played in seven games.

Although Bryant's season is over, Dwight Howard insists the Lakers' fun has just begun.

The Miami Heat, resting LeBron James and most of their top players for the playoffs, earned a 96-95 win over the Cleveland Cavaliers on Monday.

Norris Cole stripped Kyrie Irving of the ball with 2.2 seconds left to give to give the Heat the win, finishing with 18 points, 11 rebounds and nine assists.

Race organizers said the London Marathon would go ahead on Sunday despite the death of at least three people in explosions near the finish line of the Boston Marathon, but police said they would review security plans.

British Prime Minister David Cameron wrote on Twitter that footage from the blasts was "shocking and horrific", and said that his thoughts were with those affected.

The twin blasts that killed three people and injured scores at the Boston marathon are a warning for Russia as it prepares to host the 2014 Winter Olympic Games, the sports minister said on Tuesday.

"For Russia, which will have to soon stage a number of major sporting events, this is a serious warning bell," RIA Novosti quoted Vitaly Mutko as saying.

Carlos Boozer turned his shoulder and knocked Dwyane Wade to the floor, while Nate Robinson shoved LeBron James in the same sequence.

It was physical, rugged and exactly what the Miami Heat needed as part of their preparations for the playoffs, which start this coming weekend. James scored 24 points and Wade finished with 22 as the Heat set a club record for home wins in an NBA season by beating the Chicago Bulls 105-93 on Sunday.

Two fans were shot to death on their way to a test event Sunday at a World Cup stadium in northeastern Brazil, just two months before the venue hosts matches in the Confederations Cup.

The fans were killed about 5 kilometers (3 miles) from the Arena Castelao in the city of Fortaleza, one of the six venues hosting matches in the Confederations Cup in June and one of the 12 getting ready for next year's World Cup.

Cristiano Ronaldo scored his 49th and 50th goals in all competitions this season as Real Madrid won 3-0 at Athletic Bilbao on Sunday, while Barcelona didn't need Lionel Messi to brush aside Real Zaragoza 3-0 and ease closer to the Spanish league title.

Ronaldo opened with a dipping free kick two minutes in and scored again in the 69th, before passing for Gonzalo Higuain to net a third in the 76th.

AC Milan and Napoli played out an entertaining 1-1 draw at San Siro in a battle for an automatic Champions League spot on Sunday.

It was a mixed night for Mathieu Flamini, who fired Milan into the lead in the 30th minute but was sent off 18 minutes from time.