Fourth arrest after two boys, 15, stabbed in park

A fourth teenager has been arrested after two boys, both aged 15, were stabbed in a park in Lancashire.
The 16-year-old suspect was arrested on suspicion of conspiracy to commit wounding following the attack at Moor Park in Preston on Monday.
On Tuesday three other boys, one aged 14 and two 15-year-olds, were held on suspicion of attempted murder and affray, wounding and affray, and assisting an offender.
One of the injured boys remains in a serious but stable condition while the other's injuries are "less serious", a force spokesman said.
The stabbings happened at about 16:00 BST at the park close to Blackpool Road.
Police have appealed for witnesses or anyone with relevant dashcam or CCTV footage to come forward.
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