Rotted wooden beams are the likely cause of the Berkeley balcony collapse that killed six students, a white man opened fire during a prayer meeting inside a historic black church in the US, New Rangers manager - Mark Warburton - has signed former Ireland Under 21 captain Rob Kiernan, and Simon Cowell is being honoured with the 24th Music Industry Trusts Award. These are some of the latest and most read news stories on irishexaminer.com this morning.