Boston, Massachusetts native Donnie Wahlberg and actor Michael Chiklis were among the concerned Americans who took to Twitter.com on Monday (15Apr13) in a bid to make sure loved ones and friends in the city were OK after the double blast that marred the famous marathon. Wahlberg was hoping to get an update from his New Kids On The Block bandmate Joey McIntyre, who was running in the race, while Chiklis just urged family members to get in touch with him. McIntyre assured Wahlberg and his followers he was OK, revealing he had crossed the finish line just five minutes before the blasts sent debris and smoke towering over the last stretch of the marathon, killing two people and injuring many more. Relieved to hear his bandmate was unharmed, Wahlberg tweeted: "Going to be off twitter for a while today. Many friends and loved ones to check in on. Please #PrayforBoston and all those impacted by this." Meanwhile, Chiklis wrote, "To all my people back home. Please let me know that you are alright." And thoughts and prayers were tweeted by Justin Timberlake, Miley Cyrus, Rob Lowe, Elizabeth Hurley and Simon Cowell, who wrote: "Watching the news. Horrendous. Please god no more bombs. Stay safe America." Bette Midler urged her followers not to jump to conclusions about possible terrorist attacks, adding, "Terrible news out of Boston. But before we jump to conclusions about the perps (perpetrators), we should wait; too many crazies (with agendas) to count." And Alicia Keys tweeted: "Shaken… My thoughts and prayers are with the city of Boston and those affected by this tragedy," while her pop peer Pink added, "Our thoughts and prayers are with everyone affected by the explosions in Boston." Earlier in the day, Lindsay Lohan, Eva Longoria and actress Chloe Grace Moretz were among the first celebrities to comment on the shocking incident, and U.S. leader Barack Obama staged a press conference at the White House, in which he stated, "The American people will say a prayer for Boston tonight... We don't have all the answers but we do know that multiple people have been wounded, some gravely." He added, "Make no mistake, we will get to the bottom of this and we will find out who did this and we will find out why they did this. Any responsible individuals, any responsible groups will feel the full weight of justice."