There is no universally accepted set of characteristics which define the term pogrom. Klier writes that "when applied indiscriminately to events in Eastern Europe, the term can be misleading, the more so when it implies that 'pogroms' were regular events in the region and that they always shared common features." Use of the term pogrom to refer to events in 1918–19 in Polish cities including Kielce pogrom, Pinsk massacre and Lwów pogrom, was specifically avoided in the 1919 Morgenthau Report and the word "excesses" was used instead because the authors argued that the use of the term "pogrom" required a situation to be antisemitic rather than political in nature, which meant that it was inapplicable to the conditions existing in a war zone, and media use of the term pogrom to refer to the 1991 Crown Heights riot caused public controversy. In 2008, two separate attacks in the West Bank by Israeli Jewish settlers on Palestinian Arabs were characterized as pogroms by then Prime Minister of Israel Ehud Olmert.