13 people , including two children , were killed in fighting , officials say . Some 40 Dutch police officers are also positioned in Donetsk for now . Fighting on Sunday prevented teams from going to MH17 crash site . Ukraine claims Russia sent more troops to towns near Kiev .
13 people , including two children , were killed in fighting , officials say . Fighting on Sunday prevented teams from going to MH17 crash site . Ukraine claims Russia sent more troops to towns near Kiev .