Slow traffic and road closed due to accident on A352 between B3144 Alington Avenue (Dorchester) and A353 / B3390 (Warmwell). The collision happened on the outskirts of Broadmayne with the road now completely closed.
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The families of all four of the victims, all of whom were men, have been informed, police said.
Saturday evening's weather for the east
Saturday evening's weather for the west