This is stated in the OSCE SMM report, based on the information received as of 19:30, 15 January 2018.
In Donetsk region, the SMM recorded more ceasefire violations, including about 125 explosions, compared with the previous 24 hours (about 65 explosions). In Luhansk region, the SMM recorded a ceasefire violation (explosion); it had recorded about 40 ceasefire violations, including 11 explosions, in the previous 24 hours.
In addition, the SMM observed armoured combat vehicles, an anti-aircraft gun and other indications of military-type presence in the security zone.
“In government-controlled areas, the SMM on 15 January saw an IFV (BMP-2) near Novotroitske (57km north-west of Donetsk) and a stationary reconnaissance vehicle (BRDM-2) near Muratove (51km north-west of Luhansk). On 12 January, an SMM mini-UAV spotted a probable anti-aircraft gun (ZU-23-2, 23mm) mounted on a stationary truck east of Mariupol (102km south of Donetsk),” reads the report.