Residents in northern Mali say that suspected radical jihadists have blown up two bridges near the country's border with Niger.
The attack comes only a day after suspected jihadists fired mortar rounds on the city of Gao, wounding at least seven people.
The violence has broken a relative calm in and around Gao since late March.
Ousmane Maiga, a resident of Gao, said the two bridges were attacked early Tuesday. An official with the UN peacekeeping mission confirmed the explosions.
Gao was under the control of al-Qaida-linked militants for nine months until a French-led military operation in January ousted them from the town. Back in January, the radical militants also blew up another bridge near the border with Niger.