Hurling pipe bombs and setting off firecrackers, "Night Disturbance Units" have become a new phenomenon on the Gaza-Israel border in the run-up to the first anniversary of deadly border protests.
Organisers say the intention of the night-time events is to fray the nerves of Israeli military lookouts and to lower morale in Israeli villages along the 30-mile frontier.
With loudspeakers blaring patriotic music into the dark, the dusk-till-dawn demonstrations began small and escalated in recent days, ahead of a massive protest rally expected at sites along the frontier on Saturday.