JERUSALEM (Reuters) -At least two people have died and four were seriously wounded in a shooting in Tel Aviv’s city center on Thursday, the latest of several attacks in which 13 people have been killed over the past month, the sharpest spike in Israel for years. An Israeli hospital official said two people were killed. The Magen David Adom ambulance service said it had transported six people with serious injuries to hospital. Large numbers of emergency responders arrived on the scene and police, searching for the shooter, told residents to stay indoors. “A terrorist opened fire at short range …