NEW : Barack Obama checks in with his daughter , who has run the marathon in the past . Secretary of State John Kerry -- a former Massachusetts senator with deep ties to Boston -- found out about the blasts when he was on his way to Chicago on his way home from a 10-day foreign trip , and called his daughter Vanessa , who has run the Boston Marathon in the past , a senior State Department official said . NEW : Canada 's prime minister laments an `` inspiring event clouded by senseless violence '' Police from London to Los Angeles on heightened alert ; off-duty Miami cops called in . Boston police say they are reviewing security for the city 's marathon on Monday .
NEW : Barack Obama checks in with his daughter , who has run the marathon in the past . NEW : Canada 's prime minister laments an `` inspiring event clouded by senseless violence '' Police from London to Los Angeles on heightened alert ; off-duty Miami cops called in . Boston police say they are reviewing security for the city 's marathon on Monday .