A Turkish court on Thursday acquitted four journalists, including AFP photographer Yasin Akgul, who were on trial over mass demonstrations in Istanbul in March, a case that drew condemnation from press freedom watchdogs.The four, all photographers, were arrested in dawn raids several days into a huge wave of protests sparked by the arrest of Istanbul's powerful opposition mayor Ekrem Imamoglu, a top opponent of President Recep Tayyip Erdogan.They like thousands of protesters were accused of violating the law on demonstrations and public gatherings.