Armed police have been patrolling the area of Luton, where a teenage boy was shot at the weekend.
The 16-year-old was gunned down early on Saturday morning. He remains in a serious condition.
A one-thousand-pound reward is being offered for information.
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A police officer from Northampton is being held on suspicion of murdering his wife.
It will be a windy weekend with occasional outbreaks of rain.