A TV appeal for help finding missing York University chef Claudia Lawrence last night led to a number of viewers calling in to the studio.
Crimewatch said it received eight calls and North Yorkshire Police received one call direct to the force.
Police are investigating these further.
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A 38-year-old man is seriously ill in hospital after the third stabbing in Sheffield in just five days.
Warm sunshine inland, cooler along coastline. Thundery shower risk in south. Mainly dry Holiday Monday but low cloud lingering in the east
Police have charged two people with murder after two teenagers died in separate fatal stabbings in Sheffield this week.