JERUSALEM — The Mamilla Mall, an upscale Jerusalem shopping street popular with fashion-conscious residents of all backgrounds, was desolate on Wednesday.

By lunchtime Hanit Tzeti, 35, had seen only two customers at the maternity clothing store where she works. “They came, bought and fled,” she said. “People are afraid.”

Israelis were in little mood for browsing after more than two dozen attacks, most by young Palestinians armed with knives, that have killed seven Israelis this month, five of them in Jerusalem. At least 12 suspects in the attacks have been fatally shot by Israeli security forces and citizens at the scenes. Some Palestinians said they were scared of being mistaken for an assailant.

New Israeli security measures introduced Wednesday included roadblocks and checkpoints at entrances of some Palestinian neighborhoods of East Jerusalem, and the deployment of reserve soldiers to bolster police forces.