M23 rebels staged a public display of seized weapons in Uvira, saying they were collected to restore order after recent fighting.
The group claims the arms were taken from abandoned army positions and allied Wazalendo militias.
M23 says residents cooperated, describing the operation as a security measure rather than a confrontation.
The show of force brought a fragile calm to the town after days of chaos.
An exceptional border crossing allowed stranded Burundian nationals to return home under M23 supervision.
Despite the lull, M23 fighters are advancing south along Lake Tanganyika towards Makobola.
The push threatens key trade routes and risks widening the conflict in eastern Democratic Republic of Congo.

Al Jazeera’s Alain Uaykani reports from Uvira, the eastern democratic republic of Congo.

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