 A heavy police presence has smothered central ulcers, effectively blocking a resumption of a weekly protest movement that the authorities had decided they can no longer tolerate, trying to store about 20 security force vehicles in the centre of the city, six police sitting inside one, as it stood by a cafe where people drank coffee and at tables outside, nearby police stood next to barriers closing off the side streets. One regular protester who gave only his first name Amaruche, for fear of reprisals after a wave of arrest, had initially said he planned to demonstrate as usual, but later on Friday he said he had not been able to.