Inclusion Criteria: - Adult patients, >/= 18 years of age - Histologically or cytologically documented advanced solid tumors - Adequate hematologic and end organ function - Measurable disease by RECIST v1.1 - Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 - Resolution of any acute, clinically significant treatment-related toxicity from prior therapy to Grade </=1 prior to study entry, with the exception of alopecia Exclusion Criteria: - Any approved anti-cancer therapy, including chemotherapy, hormonal therapy, radiotherapy, or herbal therapy intended as anti-cancer therapy, within 3 weeks prior to initiation of study treatment; the following are allowed: hormonal therapy with gonadotropin-releasing hormone agonists or antagonists for prostate cancer, hormone-replacement therapy, and palliative radiotherapy for bone metastases > 2 weeks prior to Day 1 - Biphosphonate therapy for symptomatic hypercalcemia - Known clinically significant liver disease - Known primary central nervous (CNS) malignancy or active CNS metastases (progressing or requiring anticonvulsants or corticosteroids for symptomatic control) - Pregnant or lactating women - Known hypersensitivity to Chinese hamster ovary cell products or other recombinant human antibodies - History of autoimmune disease - History of idiopathic pulmonary fibrosis - History of HIV or hepatitis C infection; history of hepatitis B is allowed if infection has resolved (absence of HBsAg) - Severe infections within 4 weeks prior to Day 1, or signs or symptoms of significant infection within 2 weeks prior to Day 1 - Initiation of oral antibiotics < 7 days prior to Day 1 - Administration of a live, attenuated vaccine within 4 weeks before Day 1 or anticipation that such a live attenuated vaccine will be required during the study - Any bevacizumab-specific exclusion criteria