Various research have been directed towards investigating the behaviour of political parties engaging in attacks. However, this topic has predominantly been studied in campaigning venues while focusing only on the attacker (parties that are attacking). This study contributes to the existing literature by (i) studying attack behaviour in the parliamentary venue, and (ii) analysing the interactions between both the attacker and the target. To this end, this paper uses longitudinal data on attacks during question time sessions in the parliaments (2010 to 2020) of Belgium, Croatia and the United Kingdom. More specifically, I investigate the conditions that make parties engage in mutual attacks. These conditions can be characterised along three dimensions: time (proximity to elections), status (government vs. opposition), and ideology (close vs. distant). The results confirm the overarching argument that: (i) more attacks in parliaments happen closer to election day; (ii) opposing parties are more likely to attack the government rather than vice-versa; (iii) governing parties equally attack the opposition and themselves; and finally, (iv) the larger the ideological distance between parties, the more likely attacks happen (with mainstream parties engaging equally in attack behaviour compared to radical parties). As such, these findings contribute to our understanding of attack strategies between parties in regular day-to-day politics.