The brothers collected stones and bricks which were thrown at the boys' heads; when alerted by the sound of passers-by, the suspects covered the two boys with a sheet which they then set alight, causing burns to the victims.
The brothers collected stones and bricks. These stones and bricks were thrown at the boys' heads. When alerted by the sound of passers-by, the suspects covered the two boys with a sheet. They then set alight. They then was causing burns to the victims this sheet.