Buffalo Sabres' Chad Ruhwedel looks on during NHL hockey practice in Buffalo, N.Y., Tuesday, April 16, 2013. In the midst of a late-season playoff push, the Buffalo Sabres are expected to take time to reflect on the tragic events that shook the Boston Marathon on Monday. The attack on the marathon is prominent for the Sabres, who were preparing to travel to play the Bruins for a game on Wednesday. (AP Photo/David Duprey)BOSTON (AP) — Safety has been tightened at the TD Garden, where the Boston Bruins had been scheduled to play the Buffalo Sabres on Wednesday night time in the first major sporting adventure within the city since the marathon bombings.